Inventor · disambiguated record
Donald A. Frederick
Also filed as: FREDERICK DONALD · FREDERICK DONALD A · FREDERICK DONALD ADAM
22 granted patents·697 citations·filing 1988–2005
96Inventor score
Top patents by PatentIndex Score
22 records- 0192US6269198B1Acoustic sensing system for downhole seismic applications utilizing an array of fiber optic sensorsLITTON SYSTEMS INC·Filed 1999·Granted Jul 31, 2001·128 cites·26 claims
- 0286US6104846ASystem for splicing sensors into a multiple fiber optical cableLITTON SYSTEMS INC·Filed 1998·Granted Aug 15, 2000·77 cites·20 claims
- 0384US6728165B1Acoustic sensing system for downhole seismic applications utilizing an array of fiber optic sensorsLITTON SYSTEMS INC·Filed 1999·Granted Apr 27, 2004·92 cites·57 claims
- 0484US5696857AWDM/FDM fiber optic sensor architecture using WDM tap couplerLITTON SYSTEMS INC·Filed 1996·Granted Dec 9, 1997·56 cites·5 claims
- 0582US5555086ACoherence multiplexed interferometric signal processing system and methodLITTON SYSTEMS INC·Filed 1992·Granted Sep 10, 1996·45 cites·28 claims
- 0680US7227814B2Repairable fiber optic hydrophone assemblyL 3 COMM CORP·Filed 2005·Granted Jun 5, 2007·14 cites·24 claims
- 0773US6288975B1Acoustic sensing system for downhole seismic applications utilizing an array of fiber optic sensorsLITTON SYSTEMS INC·Filed 1999·Granted Sep 11, 2001·52 cites·61 claims
- 0870US6072921AMethod of operating a fiber-optic acoustical sensor, apparatus for practicing the method, and in-line fiber-optic polarizer usable in such apparatusLITTON SYSTEMS INC·Filed 1997·Granted Jun 6, 2000·45 cites·18 claims
- 0965US5867258ASystem for multiplexed high resolution measurement of frequency variations in multimode fiber laser acoustic sensorsLITTON SYSTEMS INC·Filed 1997·Granted Feb 2, 1999·35 cites·11 claims
- 1064US5737278AExtended, flexible, spatially weighted fiber optic interferometric hydrophoneLITTON SYSTEMS INC·Filed 1996·Granted Apr 7, 1998·31 cites·11 claims
- 1161US6744965B2Pressure vesselLITTON SYSTEMS INC·Filed 2000·Granted Jun 1, 2004·8 cites·11 claims
- 1261US5625724AFiber optic hydrophone having rigid mandrelLITTON SYSTEMS INC·Filed 1996·Granted Apr 29, 1997·38 cites·3 claims
- 1356US6507679B1Long distance, all-optical telemetry for fiber optic sensor using remote optically pumped EDFAsLITTON SYSTEMS INC·Filed 1999·Granted Jan 14, 2003·23 cites·84 claims
- 1456US6434283B2In-line fiber-optic polarizerLITTON SYSTEMS INC·Filed 2000·Granted Aug 13, 2002·4 cites·17 claims
- 1549US5751425AApparatus and method for detecting rotation rate, Faraday bias and cavity length in a ring laser gyroscopeLITTON SYSTEMS INC·Filed 1996·Granted May 12, 1998·18 cites·30 claims
- 1648US7054521B2Architecture for large optical fiber array using standard 1×2 couplersNORTHROP GRUMMAN CORP·Filed 2004·Granted May 30, 2006·2 cites·23 claims
- 1748US6768829B2Architecture for large optical fiber array using standard 1×2 couplersLITTON SYSTEMS INC·Filed 2001·Granted Jul 27, 2004·2 cites·29 claims
- 1848US6249622B1Architecture for large optical fiber array using standard 1×2 couplersLITTON SYSTEMS INC·Filed 1998·Granted Jun 19, 2001·9 cites·2 claims
- 1935US5995207AMethod for determining the phase difference of light waves propagated over two pathsLITTON SYSTEMS INC·Filed 1997·Granted Nov 30, 1999·8 cites·17 claims
- 2035US4969743AFaraday magnet for the reduction of multi-oscillator bias thermal sensitivityLITTON SYSTEMS INC·Filed 1988·Granted Nov 13, 1990·6 cites·6 claims
- 2131US6038926ATDM array of optical non-acoustic pressure sensorsFiled 1997·Granted Mar 21, 2000·2 cites·19 claims
- 2231US5815266ASensing method and apparatusLITTON SYSTEMS INC·Filed 1996·Granted Sep 29, 1998·2 cites·26 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →