Lowrance Electronics, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
D329615 Transducer for attachment to a boat or similar articleExpiredNov 16, 90Sep 22, 92[]
D329616 Transducer for attachment to a boat or similar articleExpiredNov 16, 90Sep 22, 92[]
5109364 Transducer for high speed boatsExpiredNov 16, 90Apr 28, 92[H04R]
4938165 Mounting of transducer in a boat hullExpiredJun 10, 88Jul 03, 90[G01C]
4907208 Sonar transducer assembly for fishing boatsExpiredDec 02, 88Mar 06, 90[H04R]
4879697 Sonar fish finder apparatus providing split-screen displayExpiredAug 05, 88Nov 07, 89[G01S]
4612633 Sonar apparatus with means to transmit and print on alternate cyclesExpiredJul 01, 83Sep 16, 86[G01S]
D278690 Housing for sonar unitExpiredAug 09, 82May 07, 85[]
4480809 Gimbal bracket mounting for instrumentExpiredSep 22, 82Nov 06, 84[F16M]
4456210 Transducer mountingExpiredAug 12, 82Jun 26, 84[F16B]
4420824 Sonar apparatus having improved gain controlExpiredFeb 07, 83Dec 13, 83[G01S]
4369508 Sonar having signal amplitude differentiation and noise suppressionExpiredNov 18, 80Jan 18, 83[G01S]
4322827 Range expander for sonar systemExpiredSep 22, 80Mar 30, 82[G01S]
4189702 Commutator and fiber brush rotating discExpiredSep 25, 78Feb 19, 80[G01S]
4186372 Brush holder for rectilinear recorderExpiredSep 25, 78Jan 29, 80[G01S, G01D]

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