Whitehall Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5631874 Telemetry transmission protocol for towed hydrophone streamerExpiredMar 14, 95May 20, 97[G01V]
5592437 Data collection and relay circuit for towed hydrophone arrayExpiredSep 23, 93Jan 07, 97[H03G, G01V]
5583824 Telemetry data transmission circuit having selectable clock sourceExpiredSep 23, 93Dec 10, 96[H03M, G01V]
5579286 Quiet geophysical construction practices for reduced diameter streamersExpiredNov 22, 94Nov 26, 96[G01V]
5523983 Dual rope vibration isolation module for towed hydrophone streamerExpiredNov 18, 94Jun 04, 96[B63B, G01V]
5513151 Towed hydrophone streamer with integrated module couplerExpiredNov 21, 94Apr 30, 96[H04R, H01R]
5450369 Telemetry transmission protocol for towed hydrophone streamerExpiredSep 12, 94Sep 12, 95[G08C, G01V]
5412621 Encapsulated hydrophone element for towed hydrophone arrayExpiredSep 23, 93May 02, 95[H04R]
5408442 Hydrophone element with filter circuitExpiredSep 23, 93Apr 18, 95[H04B]
5400298 Towed hydrophone streamer with distributed electronics housingsExpiredSep 23, 93Mar 21, 95[G01V]
5367499 Vibration isolation module for towed hydrophone streamerExpiredSep 23, 93Nov 22, 94[B63B, G01V]
4796365 Underwater compass sensor with compass ditherExpiredOct 05, 87Jan 10, 89[G01C]
4530075 Marine seismic streamer couplerExpiredSep 09, 83Jul 16, 85[H04B, G01V]
4500980 Seismic streamer connector assemblyExpiredAug 24, 81Feb 19, 85[H04B, G01V]
D263217 Housing for an arc suppressorExpiredDec 10, 79Mar 02, 82[D130]
D263218 Housing for an arc suppressorExpiredDec 10, 79Mar 02, 82[D130]

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