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FIBER OPTIC SENSORS
A fiber optic sensor is a sensor that uses optical fiber either as the sensing element ("intrinsic sensors"), or as a means of relaying signals from a remote sensor to the electronics that process the signals ("extrinsic sensors"). Fibers have many uses in remote sensing. Depending on the application, fiber may be used because of its small size, or the fact that no electrical power is needed at the remote location, or because many sensors can be multiplexed along the length of a fiber by using different wavelengths of light for each sensor, or by sensing the time delay as light passes along the fiber through each sensor. Time delay can be determined using a device such as an optical time-domain reflectometer. This report takes a look into the patenting activity around fiber optic sensors uncovering the inventors, patents, the companies and the intellectual property history behind these devices.
Technology Insight Report
Disclaimer: This report should not be construed as business advice and the insights are not to be used as the basis for investment or business decisions of any kind without your own research and validation. Gridlogics Technologies Pvt. Ltd disclaims all warranties whether express, implied or statutory, of reliability, accuracy or completeness of results, with regards to the information contained in this report.
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Brief History of Fiber Optic Sensor
Fiber optics, though used extensively in the modern world, is a fairly simple and old technology. Guiding of light by refraction, the principle that makes fiber optics possible, was first demonstrated by Daniel Colladon and Jacques Babinet in Paris in the early 1840s. John Tyndall included a demonstration of it in his public lectures in London a dozen years later.
It was in the year 1956 that Kapany first officially introduced the term “fiber optics”. He defined fiber optics as the art of the active and passive guidance of light, in the ultraviolet, visible, and infrared regions of the spectrum, along transparent fibers through predetermined paths. Since then, fiber optics has been used in various photo-electronics devices, data processing, and photocopying systems. Today, optical fibers are primary components of global and local telecommunication systems. The primary method of transmitting information via optical fiber is digitally, that is, by sequences of optical pulses whose positions, widths, or occurrences can be modulated. The invention of the laser in 1962 immediately stimulated a revolution that designers created fiber optic sensors combining optical fibers and optoelectronic devices with the application of this coherent light source.
Fiber optic sensors are attractive because they offer excellent sensitivity and dynamic range, compatibility with optical data transmission and processing, long lifetimes and potential, low cost and high reliability. They are immune to electromagnetic interference. Fiber optic sensors can also work in other hostile environments, where there may be high temperatures, high-voltage, corrosive materials, all-solid-state configurations, vibration and explosion hazards, and where traditional sensors and transducers do not work well. The lightweight and small sizes of these devices are critical in such areas as aerospace and provide substantial advantages to many products. The comparable low cost is another advantage of fiber optic sensors. With each new successful product the cost of existing and newly introduced components continues to drop, opening the door for new waves of fiber sensor products. These developments include the replacement of conventional spinning mass-inertial sensors with fiber optic gyros, widespread use of fiber optic sensors in process control and manufacturing, electrical isolation of patients in medicine, and fiber optic health monitoring systems in the aerospace and construction industries.
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Overview
With the help of Patent iNSIGHT Pro, we will analyze the all the patent data around Fiber Optic Sensors to find answers to the following:
What does the IP publication trend for Fiber Optic Sensors look like and how has activity around filings evolved?
Who are the top assignees or key players in Fiber Optic Sensors and what are their technology wise trends?
How is the Assignee portfolio spread across different sensor types and application areas?
To get deeper insights the patent set has been classified as follows:
By Types
Extrinsic/Hybrid Fiber Optic Sensors a) Bragg Grating Sensors b) Extrinsic Fabry Perot Fiber Sensors
Intrinsic Fiber Optic Sensors a) Distributed Sensors b) Interferometric Sensors c) Intrinsic Fabry Perot Fiber Sensors d) Microbend Sensors Fiber Optic Electronic Parts
Image Source: http://communication.howstuffworks.com/fiber-optic-communications/fiber-optic.htm
By Applications
Chemical/ Bio Detection
Defense
Encoder Plates/ Disks
Industrial Applications a) Humidity b) Induction Heating c) Plastic Film
Mode Coupling
Infrastructure a) Bridges
i) Suspension Bridges ii) Truss
b) Buildings c) Tunnels
Oil and Gas
Pyrometers
Raman Scattering
Rayleigh Scattering
Transportation a) Acoustic Sensors
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b) Automobiles c) Fire Detection
Youngs Modulus The illustration below shows the different categories prepared and the number of records in each. The categorization involved defining a search strategy for each topic and then conducting the search using the Advanced Searching capability in Patent iNSIGHT Pro. Details of search strings used for each category are given in Appendix B.
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The Search Strategy Using the commercial patent database PatBase as our data source we used the following search query to create our patent set. TAC – Title Abstract Claims
The query was directed to search through the title, abstract and claims and a patent set of 1963 records with one publication per family was generated. The publications included in the report are updated as of 14th July, 2011.
(TAC= ((fiber w/3 optic) w/3 (detector* or sensor* or demodulator* or "sensing element")))
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Publication Trend What has been the IP publication trend for Fiber Optic Sensors?
The patent publication trend in the form of a bar graph shows activity from as early as the 1960’s and 1970’s, although the number of filings remained relatively low all the way up till the year 2000. From 2001 which saw a jump to 80 patents published, there was increase in number of publications from 2006 which saw more than 100 patents.
It’s clear the current activity around these technologies is likely to continue seeing more innovation in the near future. How we did it?
Once the patents were populated in Patent iNSIGHT Pro, the publication trend chart was generated on a single click using the dashboard tool.
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Top Assignees
Who have been the top assignees or the key players within this industry?
The top assignees are: How we did it?
Once the patents were populated in Patent iNSIGHT Pro, the assignee clean- up tools were used to normalize the names. Different cleanup tools were leveraged: • To locate assignees for unassigned records • To clean up records having multiple assignees • To locate the correct assignee names for US records using the US assignments database • To merge assignees that resulted from a merger or acquisition or name change.
Please refer Appendix A for more details on Assignee merging.
Once the Assignee names were cleaned up, the dashboard tool within Patent iNSIGHT Pro was used to find the top 20 assignees within the given patent set. A visual graph was created based on the results of the top assignees with the number of patents alongside each one. The complete Assignee table in available in the following Excel file: http://www.patentinsightpro.com/techreports/0811/List%20of%20Assignees.xls
11. UNIV STANFORD 12. LOCKHEED MARTIN CORP 13. HALLIBURTON INC. 14. VIRGINIA TECH INTELLECTUAL
PROPERTIES INC. 15. CALIFORNIA INSTITUTE OF
TECHNOLOGY 16. US ARMY
17. MECHANICAL TECHNOLOGY INC 18. NXTPHASE CORP
19. FIBERCHEM INC. 20. GENERAL MOTORS CORP
1. NORTHROP GRUMMAN CORP 2. HONEYWELL INC. 3. US NAVY 4. BAKER HUGHES INC. 5. ABB GROUP 6. WEATHERFORD INC. 7. SIEMENS AG 8. GENERAL ELECTRIC CO. 9. BOEING CO. 10. SCHULMBERGER TECHNOLOGY
CORP
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Top Countries How is research in Fiber Optic Sensors spread across different countries?
In terms of regional pockets where patent protection is being sought most frequently for these technologies, the US is in the lead, followed by JP and AU. The map below breaks down slot machine patenting activity priority country wise from 1950. The table below ranks the top 10 priority countries and therefore provides an indication of where the innovation in this technology area is originating:
Country Code
Total
US 1324
DE 180
CN 83
JP 72
RU 36
KR 32
GB 25 How we did it? The map was generated using the Priority country coverage map option provided in the dashboard tool within Patent iNSIGHT Pro.
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Assignee - Key Statistics
Here we summarize key parameters of Top 15 Assignees such as filing trend, Avg. number of Forward citations per record, Top inventors in each Assignee, Top Co-Assignees and Coverage of underlying patent families
Assignee
Total No. of
Records
Average No. of Fwd Cites per
Patents
Filing Trend ( Absolute )
Filing Year
Range
Key Inventor (Top 5)
Co-Assignees
Coverage
(Includes families)
US
EP
WO
JP
DE
AU
NORTHROP GRUMMAN
CORP 98 (5%) 10.2 1977-
2009
HALL DAVID B(14)
CORDOVA AMADO(13)
LAYTON MICHAEL R(8)
PAVLATH GEORGE A(7)
FERSHT SAMUEL N(7)
No Co-Assignee Present
32 1 4 1 0 0
HONEYWELL INC.
63 (3.2%)
9.76 1978-2010
SANDERS GLEN A(7)
STRANDJORD LEE K(5)
ANG DICK(3) BLAKE JAMES
N(3) BERGH RALPH
A(3)
SANDIA CORP(1) 17 2 4 1 0 0
US NAVY 60
(3.1%) 16.45
1976-2010
KERSEY ALAN D(13)
BUCARO JOSEPH A(11)
LAGAKOS NICHOLAS(9) DANDRIDGE ANTHONY(7)
DEUS III ANTONIO L(4)
No Co-Assignee Present
51 0 2 0 0 0
BAKER HUGHES
INC
44 (2.3%)
6.7
1984-2010
TUBEL PAULO S(8)
HARRELL JOHN W(8)
PAULO S TUBEL(7) JOHNSON
MICHAEL H(6) JOHN W
HARRELL(5)
No Co-Assignee Present
11 0 3 0 0 7
ABB GROUP
36 (1.8%)
5.44 1982-2011
BOHNERT KLAUS(24) BRAENDLE HUBERT(10)
FRANK ANDREAS(6)
GABUS PHILIPPE(5) NEHRING
BOHNERT KLAUS(2)
BRAENDLE HUBERT(1)
FRANK ANDREAS(1
) WUEST
ROBERT(1)
0 2 1 0 0 0
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JUERGEN(3)
WEATHERFORD INC.
33 (1.7%)
11.73
1996-2008
MARON ROBERT J(5)
KERSEY ALAN D(5)
GYSLING DANIEL L(5)
OGLE PETER C(4)
JONES RICHARD T(3)
No Co-Assignee Present
2 0 0 0 0 0
SIEMENS AG
32 (1.6%)
2.62 1975-
2010
SCHOBER HERBERT(4)
WILLSCH MICHAEL(3)
HAPPEL TOBIAS(3)
BOSSELMANN THOMAS(2)
KNOCHE WOLFRAM(2)
SCHOBER HERBERT(3
) BOSSELMA
NN THOMAS(1)
FRANKE MARTIN(1) FRENZEL
HENRYK(1) GAMULESCU TUDOR
ION(1)
2 3 2 0 9 0
GENERAL ELECTRIC
CO
29 (1.5%)
7.31 1986-2009
XIA HUA(7) RUGGIERO ERIC
JOHN(5) MCCARTHY
KEVIN THOMAS(4) FELDMAN
SANDRA F(2) RODRIGUEZ ERDMENGER RODRIGO(2)
No Co-Assignee Present
10 0 1 0 0 0
BOEING CO 26
(1.3%) 17.73
1979-2007
UDD ERIC(10) CAHILL
RICHARD F(3) THERIAULT JOHN P(3) MICHAL
RONALD J(2) KHOSHNEVISAN
MOHSEN(1)
No Co-Assignee Present
12 0 0 0 0 0
SCHLUMBERGER
TECHNOLOGY CORP
23 (1.2%)
4.22 1998-2011
YAMATE TSUTOMU(6) SCHROEDER ROBERT J(6)
RAMOS ROGERIO T(5)
MADHAVAN RAGHU(4)
UDD ERIC(2)
PRAD RES AND DEV
LTD(3) PEIRCE IAN(2)
RAMOS ROGERIO TADEU(2) ROBERTS DAMON(2)
ALLIOT VINCENT(1)
1 1 2 0 0 0
UNIV STANFORD
21 (1.1%)
18.14 1981-2010
SHAW HERBERT J(10)
KIM BYOUNG Y(6)
DIGONNET MICHEL J F(4)
PAVLATH GEORGE A(3)
KINO GORDON S(3)
No Co-Assignee Present
3 1 1 0 0 0
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LOCKHEED MARTIN CORP.
15 (0.8%)
16.87
1985-2003
MUHS JEFFREY D(4)
ANDREWS JEFFREY P(2)
TOBIN KENNETH W(1)
GUERCI JR CARL F(1)
MCCLINTOCK JOSEPH A(1)
No Co-Assignee Present
11 0 1 0 0 0
HALLIBURTON INC.
13 (0.7%)
4.69 2001-2010
SKINNER NEAL G(7)
BERTHOLD JOHN W(4)
RODNEY PAUL F(2)
SHAH VIMAL V(2)
LOPUSHANSKY RICHARD L(2)
No Co-Assignee Present
4 0 2 0 0 0
VIRGINIA TECH
INTELLECTUAL
PROPERTIES INC.
13 (0.7%)
9.62 1991-2007
WANG ANBO(8) MURPHY KENT
A(4) CLAUS RICHARD
O(3) ZHU YIZHENG(2)
WANG XINGWEI(2)
FURUKAWA ELECTRIC CO LTD(1)
LUNA INNOVATIONS INC(1)
8 0 0 0 0 0
CALIFORNIA
INSTITUTE OF
TECHNOLOGY
12 (0.6%)
4.33 1985-2008
LEWIS NATHAN S(9)
SEVERIN ERIK J(5)
GRUBBS ROBERT H(3)
SANNER ROBERT D(2) KELSO DAVID
M(1)
LEWIS NATHAN
S(1) SANNER ROBERT
D(1) SEVERIN ERIK J(1) SMITHS
DETECTION INC(1) US AS
REPRESENTED BY THE ADMINSTRA
TOR OF NASA(1)
4 1 2 1 0 0
How we did it? In order to compress all the information into a single report, we used the 360 ° series of reports available in the software. From the Assignee 360° report options, we selected Top 15 Assignees and the different pieces of information we wanted to include in the singular display and then ran the report. The generated report was then exported to Excel using the option provided for the same.
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Feedbacks and Comments on this report can be sent to [email protected]
Inventor - Key Statistics Here we summarize key parameters of Top 15 Inventors such as filing trend, average number of forward citations per record, key associated companies and top 5 co-inventors.
Inventor Total No. of
Records
Average No. of Fwd Cites per
Patents
Filing Trend ( Absolute )
Filing Year
Range
Key Assignees (Top 5)
Co-Inventors
BOHNERT KLAUS
26 (1.3%) 4.04
1988-2011
ABB GROUP(26) BOHNERT KLAUS(2) WUEST ROBERT(1) BRAENDLE HUBERT(1) FRANK ANDREAS(1)
BRAENDLE HUBERT DR(11) FRANK ANDREAS(6) GABUS PHILIPPE(5) NEHRING JUERGEN(3) WUEEST ROBERT(3)
PAULO S TUBEL
25 (1.3%) 12.4
1997-2006
BAKER HUGHES INC(20) SENSOR HIGHWAY LTD(4) TUBEL PAULO S(1)
JOHN W HARRELL(22) KURT A HICKEY(12) JOHNSON MICHAEL H(11) WILLIAMS GLYNN R(7) LEMBECKE JEFFREY J(6)
KERSEY ALAN D
23 (1.2%) 19.22
1988-2005
US NAVY(13) WEATHERFORD INC.(5) CIDRA CORP(4) VILLARRUEL CARL A(1) KERSEY ALAN D(1)
DANDRIDGE ANTHONY(5) BAILEY TIMOTHY J(4) FERNALD MARK R(4) GYSLING DANIEL L(3) PUTNAM MARTIN A(3)
JOHN W HARRELL
22 (1.1%) 11.32
1997-2006 BAKER HUGHES INC(20) SENSOR HIGHWAY LTD(2)
PAULO S TUBEL(22) JOHNSON MICHAEL H(11) KURT A HICKEY(10) LEMBECKE JEFFREY J(6) BIDIGARE BRIAN(5)
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WLODARCZYK MAREK T
20 (1%) 13.85
1986-2007
WLODARCZYK MAREK T(9) GENERAL MOTORS CORP(7) POORMAN THOMAS J(4) C.R. BARD INC.(3) KABALA JERZY A(1)
POORMAN THOMAS J(4) CAMPBELL JAMES A(2) COLETTA LUCIANO(2) KRAGE MARK K(2) TANG DAH LAIN(2)
UDD ERIC 17 (0.9%) 17.35
1983-2008
BOEING CO(10) UDD ERIC(3) BLUE ROAD RESEARCH INC.(2) SCHLUMBERGER TECHNOLOGY CORP(2) CALVERT SEAN G(1)
CAHILL RICHARD F(3) THERIAULT JOHN P(3) MICHAL RONALD J(2) RAMOS ROGERIO T(2) SCHROEDER ROBERT J(2)
BLAKE JAMES N
16 (0.8%) 7.5
1993-2010
NXTPHASE CORP(7) TEXAS AM UNIVERSITY SYSTEM(5) HONEYWELL INC.(3) BLAKE JAMES N(2) ALSTOM TECHNOLOGY LTD(1)
SANDERS GLEN A(3) GLASOW CARL(2) BERGH RALPH A(1) RAHMATIAN FARNOOSH(1) SHORT SHAYNE X(1)
BERTHOLD JOHN W
15 (0.8%) 4.4
1989-2009
HALLIBURTON INC.(4) BABCOCK AND WILCOX CO(3) DAVIDSON INSTRUMENTS INC.(3) MCDERMOTT TECHNOLOGY INC(2) J W B C LLC(1)
LOPUSHANSKY RICHARD L(5) JEFFERS LARRY A(4) REED STUART E(2) BUSH IRA JEFFREY(1) COCKING SETH A(1)
HALL DAVID B 15 (0.8%) 4.8
1997-2009 NORTHROP GRUMMAN CORP(15)
FERSHT SAMUEL N(3) BATHELT CARL(1) BUNN JR JAMES S(1) FREDERICK DONALD A(1) GOLDNER ERIC L(1)
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CORDOVA AMADO
13 (0.7%) 7.62 1994-2001 NORTHROP GRUMMAN CORP(13)
FERSHT SAMUEL N(3) SURABIAN GLENN M(3) RAHN JOHN P(2) BILINSKI DONALD J(1) CARLSON KURT RANDY(1)
JOHNSON MICHAEL H
13 (0.7%) 12.23
1998-2007 BAKER HUGHES INC(11) SENSOR HIGHWAY LTD(2)
JOHN W HARRELL(11) PAULO S TUBEL(11) KURT A HICKEY(6) LEMBECKE JEFFREY J(6) BIDIGARE BRIAN(5)
KURT A HICKEY
12 (0.6%) 4.5
1998-2006 BAKER HUGHES INC(8) SENSOR HIGHWAY LTD(4)
PAULO S TUBEL(12) JOHN W HARRELL(10) JOHNSON MICHAEL H(6) LEMBECKE JEFFREY J(6) NIGEL LEGGETT(6)
SHAW HERBERT J
12 (0.6%) 17.83
1979-2003 UNIV STANFORD(10) US AIRFORCE(1) IFOS INC(1)
KIM BYOUNG Y(5) BROOKS JANET L(2) FESLER KENNETH A(2) PAVLATH GEORGE A(2) TOYAMA KEIICHIRO(2)
BRAENDLE HUBERT DR
11 (0.6%) 4.18 1997-2008
ABB GROUP(11) BOHNERT KLAUS(1) BRAENDLE HUBERT(1)
BOHNERT KLAUS(11) GABUS PHILIPPE(4) ANDERSSON LARS(1) BODOR PATRICK(1) FRANK ANDREAS(1)
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BUCARO JOSEPH A
11 (0.6%) 11.64 1978-2010 US NAVY(11)
LAGAKOS NICHOLAS(8) CAROME EDWARD F(2) DARDY HENRY D(1) HOUSTON BRIAN H(1) JARZYNSKI JACEK(1)
How we did it?
In order to compress all the information into a single report, we used the 360 ° series of reports available in the software. From the Inventor 360° report options, we selected the different pieces of information we wanted to include in the singular display and then ran the report. The generated report as then exported to Excel using the option provided for the same.
© 2011 Gridlogics. All Rights Reserved. Patent iNSIGHT Pro™ is a trademark of Gridlogics Technologies Pvt. Ltd.
Feedbacks and Comments on this report can be sent to [email protected]
Assignee portfolio across different sensor types and application areas
Categories Intrinsic Fiber Optic
Sensors
Extrinsic/Hybrid Fiber Optic
Sensors Application Areas
Inte
rfe
rom
etr
ic S
en
so
rs
Dis
trib
ute
d S
en
so
rs
Intr
insic
Fa
bry
-Pe
rot
Fib
er
Se
nso
rs
Mic
rob
en
d S
en
so
rs
Bra
gg
Gra
tin
g S
en
so
rs
Extr
insic
Fa
bry
-Pe
rot
Fib
er
Se
nso
rs
Ind
ustr
ial A
pp
lica
tio
ns
De
fen
se
Yo
un
gs M
od
ulu
s
Ch
em
ica
l/ B
io-d
ete
ctio
n
Oil
an
d G
as
Infr
astr
uctu
re
Ra
ma
n S
ca
tte
rin
g
Tra
nsp
ort
atio
n
Ra
yle
igh
Sca
tte
rin
g
Mo
de
Co
up
ling
En
co
de
r P
late
s/D
isks
Key Assignees
NORTHROP GRUMMAN CORP
22 1 4 2 4 3 1 3 1 10 1
WEATHERFORD INC.
5 2 22 1 1 6 5
US NAVY 12 5 1 5 1 1 1 7 1
BAKER HUGHES INC
10 4 8 12 2 11 1
SCHLUMBERGER TECHNOLOGY CORP
4 10 1 1 6 1 2
HALLIBURTON INC.
5 2 2 5 1 1 1 1 1
GENERAL ELECTRIC CO
8 1 2 3 1 1
BOEING CO 2 4 1 1 1 3 3 1 1
ABB GROUP 2 4 1 1 8
VIRGINIA TECH INTELLECTUAL PROPERTIES INC.
2 1 2 1 1 1
UNIV STANFORD 3 1 1 1 1
SENSOR HIGHWAY LTD
3 3 1
LUNA INNOVATIONS INC
1 1 1 1 1 1 1 1 1
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GENERAL MOTORS CORP
2 1 1 1 2
US ARMY 1 1 1 1 2 1
NXTPHASE CORP
2 1
LOCKHEED MARTIN CORP.
1 1 1 1
HONEYWELL INC.
1 1 4 1 1 3
UNITED STATES DEPARTMENT OF ENERGY
1 2 1
SIEMENS AG 1 1 3 2
REGENTS OF THE UNIVERSITY OF CALIFORNIA
1 1
CALIFORNIA INSTITUTE OF TECHNOLOGY
1 8 5 4
In the above matrix leading patent holdings within each category of sensor types and application areas have been highlighted with stronger shades of orange for larger number of patents within that category. How we did it? The clusters of types and application areas that were created for the previous analysis were correlated using the co‐occurrence analyzer and then the resulting matrix was exported to Excel using the option provided for the same.
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Keywords vs. Fiber Optic Technologies – White Space Analysis
What are the top keywords in Fiber Optic technologies and how do they vary across the different fiber optic sensor types? For this a cleaned list of keywords that were generated from the Title, Abstract and Claims. Such a table can be used for preliminary insights toward White Space Analysis. (White-spaces are gaps in a technology landscape that have potential for attaining exclusivity.) As can be seen in the table below the concept of “Electromagnetic Sensor”, “Displacement Sensor” haven’t been used in any of the Intrinsic and Extrinsic Fiber Optic Sensors. Such an indication can be further verified via patent search to confirm existence of a white space.
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© 2011 Gridlogics. All Rights Reserved. Patent iNSIGHT Pro™ is a trademark of Gridlogics Technologies Pvt. Ltd.
Feedbacks and Comments on this report can be sent to [email protected]
How we did it? First the various types of Fiber Optic Sensors were identified by online research. Then by using a combination of semantic analysis tools such as the clustering tools and searching tools available in Patent iNSIGHT Pro, patents were categorized under the different types. A clean set of keywords was generated using Patent iNSIGHT Pro using a combination of keyword list Cleanup and Auto Custer features. A co-occurrence matrix was generated to map the keywords with types. The generated matrix was exported to Excel.
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Fiber Optic Sensor types vs. Key Application Areas
How do various fiber optic sensors compare across key application areas?
In the chart below “Bragg Grating Sensors“are extensively used in Oil and Gas with 21 records. Distributed sensors are used in Raman Scattering.
How we did it? The clusters of types and application areas that were created for the previous analysis were correlated using the co‐occurrence analyzer and then the resulting matrix for converted into a bubble chart.
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Sample Portfolio Comparison of Northrop Grumman Corporation vs. other top Assignees How does the portfolio landscape of Northrop Grumman Corporation compare with other companies? What are the overlaps in the portfolios?
The map shows patents of top five assignees clustered together based on the basis of application areas. The map also shows the overlapping areas and patents in respective categories. How we did it? The VizMAP tool in Patent iNSIGHT Pro was used for this analysis. First the patents of the top five assignees were loaded on the map. The map was then analyzed in the context mode wherein each patent record is placed across to the contextual similarity with other records. The contextual similarity was calculated over Title, Abstract and Claims.
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Appendix A: Key Assignee Normalization Table Note: The tables below include normalization from US Assignments database and so some assignees may appear under multiple normalized names.
NORTHROP GRUMMAN CORP ABB GROUP
LITTON SYSTEMS INC
LITTON SYSTEMS INC US
NORTHROP GRUMMAN GUIDANCE AND
GRUMMAN AEROSPACE CORP
NORTHROP CORP
GRUMMAN AEROSPACE CORP
LITTON SYSTEMS CANADA
SPERRY MARINE INC
TELEDYNE RYAN AERONAUTICAL DIV
NORTHROP GRUMMAN CORP
LITEF GMBH
HONEYWELL INC.
HONEYWELL INC
ALLIED SIGNAL INC
MCCLARY CHARLES R
HONEYWELL INT INC
HONEYWELL ASCA INC
HODARA HENRI
HONEYWELL INC
MEASUREX CORP
FERRAR CARL M
WINSTON JR CHARLES R
ALLIED SIGNAL INC
L 3 COMM CORP
HONEYWELL FED MFG AND TECHNOLOGI SANDIA NAT LAB
BAKER HUGHES INC.
BAKER HUGHES INC
WESTERN ATLAS INTERNATIONAL INC
WESTERN ATLAS INT INC
BAKER HUGHES CORP
ASEA BROWN BOVERI
ABB RESEARCH LTD
ABB TECHNOLOGY AG
SKOLD LEIF, AKESSON ULF, ANDERSSON DAG PETERSSON YNGVE
ASEA AB
WESTINGHOUSE ELECTRIC CORP
ASEA AB
BBC BROWN BOVERI AND CIE
ASEA BROWN BOVERI
ABB FLEX AUTOMATION INC
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Appendix B: Search Strings Used for Categorization
Categorization: Types of Fiber Optic Sensors
1. Extrinsic/Hybrid Fiber Optic Sensors a) Bragg Grating Sensors
Bragg Grating Sensors
(TAC) contains ((Bragg w/3 grating*)or FBG) 160 results
b) Extrinsic Fabry Perot Fiber Sensors
Extrinsic Fabry Perot Fiber Sensors
(TAC) contains (fabry-perot and (extrinsic or external or hybrid))
18 results
2. Intrinsic Fiber Optic Sensors a) Distributed Sensors
Distributed Sensors
(TAC) contains (distributed w/3 sensor*) 74 results
b) Interferometric Sensors
Interferometric Sensors
(TAC) contains (interferomet* w/3 sensor*) 114 results
c) Intrinsic Fabry Perot Fiber Etalon Sensors
Intrinsic Fabry Perot Fiber Sensors
(TAC) contains (fabry-perot and (intrinsic or internal))
13 results
d) Microbend Sensors
Microbend Sensors
(TAC) contains(microbend w/3 sensor*) 14 results
Categorization: Applications 1. Chemical/ Bio Detection
Chemical/ Bio Detection
(TAC) contains ((chem* or bio*) w/5 (detect* or monitor*))
71 results
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2. Defense
Defense
(TAC) contains (defense or aerospace or aeronautic* or aerodynamic* or navy or naval* or army or airforce or aircraft or airplane or aerosystems or military or weapon* or submarine* or missile*)
37 results
3. Encoder Plates/ Disks
Encoder Plates/ Disks
(TAC) contains (encode* w/3 (plate* or disk*)) 2 results
4. Industrial Applications a) Humidity
Humidity
(TAC) contains (humid* or dampness* or moist*)
44 results
b) Induction Heating
Induction Heating
(TAC) contains (induction w/3 heat*) 3 results
c) Plastic Film
Plastic Film
(TAC) contains (plastic pre/3 film*) 3 results
5. Mode Coupling
Mode Coupling
(TAC) contains (mode w/3 coupl*) 9 results
6. Infrastructure a) Bridges i) Suspension Bridges
Suspension Bridges
(TAC) contains (suspension w/3 (line* or cable* or wire*))
4 results
ii) Truss
Truss
(TAC) contains truss* 2 results
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b) Buildings
Buildings
(TAC) contains building* 1 result
c) Tunnels
Tunnels
(TAC) contains tunnel* 2 results
7. Oil and Gas
Oil and Gas
(TAC) contains (oil* or gas or petro* or refin*) 190 results
8. Pyrometer
Pyrometer
(TAC) contains pyrometer* 7 results
9. Raman Scattering
Raman Scattering
(TAC) contains Raman 26 results
10. Rayleigh Scattering
Rayleigh Scattering
(TAC) contains (rayleigh or CRN) 12 results
11. Transportation a) Acoustic Sensors
Acoustic Sensors
(TAC) contains (acoustic w/3 sensor*) 82 results
b) Automobiles
Automobiles
(TAC) contains ((traffic or vehic*) w/3 control* or monitor*)
6 results
c) Fire Detection
Fire Detection
(TAC) contains (fire w/3 detect*) 5 results
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12. Youngs Modulus
Youngs Modulus
( TAC ) contains ("youngs modulus") 13 results
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Summary Fiber optic sensors began as a by-product of optical fiber research and development. The first sensors were designed to measure the performance and status of an optical network. This report graphically analyzes fiber optic sensor markets from many perspectives, categorizes and highlights the key companies involved, defines unique keywords. This report also covers the global fiber optic sensors marketplace. It focuses particularly on the markets and opportunities for fiber optic sensors in defense, oil and gas exploration and drilling, medical, and industrial markets. The study considers future opportunities for new application markets.
About Patent iNSIGHT Pro Patent iNSIGHT Pro™ is a comprehensive patent analysis platform that allows you to accelerate your time-to-decision from patent analysis activities. Designed from inputs by experienced patent researchers, Patent iNSIGHT Pro easily blends into your existing Research workflow. Patent iNSIGHT Pro is used by leading legal services, Pharmaceutical & biotech, electronics companies and research organization across US, Europe, South America and India with more than 400 end users. Patent iNSIGHT Pro is developed and marketed by Gridlogics, a research driven IT Company specializing in providing intellectual property analysis and visualization solutions to aid R&D and corporate strategy. Gridlogics is headquartered in Pune, India and has a sales presence in Delhi, Mumbai and USA. For more information:
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Sources & References
http://en.wikipedia.org/wiki/Fiber_optic_sensor
http://www.rp-photonics.com/fiber_optic_sensors.html
http://www.eaeeie.org/theiere_bratislava/1.html
http://www.wikid.eu/index.php/Fiber_optic_sensing#Two_Main_Types_of_Optical_Sensors
http://www.sensorwiki.org/doku.php/sensors/fibre_optic
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