|
| US3950723 | 21 Feb 1974 | 13 Apr 1976 | Westinghouse Electric Corporation | Sonar apparatus |
| US3953825 | 12 Jul 1974 | 27 Apr 1976 | The Board of Trustees of Leland Stanford Junior University | Electronically focused imaging system and method |
| US3962673 | 29 Oct 1974 | 8 Jun 1976 | Thomson-CSF | System for reading acoustic images |
| US4011750 | 30 Jun 1975 | 15 Mar 1977 | The Commonwealth of Australia care of the Secretary Department of Health | Method and apparatus for ultrasonic examination of objects |
| US4058003 | 21 Jul 1976 | 15 Nov 1977 | The Board of Trustees of the Leland Stanford Junior University | Ultrasonic electronic lens with reduced delay range |
| US4084150 | 17 May 1976 | 11 Apr 1978 | Fred M. Dellorfano, Jr.
Donald P. Massa | Underwater depth sounder with variable beam transducer |
| US4097835 | 20 Sep 1976 | 27 Jun 1978 | SRI International | Dual transducer arrangement for ultrasonic imaging system |
| US4099419 | 1 Mar 1977 | 11 Jul 1978 | Hitachi Medical Corporation | Ultrasonic tomography apparatus |
| US4109642 | 25 Mar 1974 | 29 Aug 1978 | Institute of Applied Physiology & Medicine | Apparatus for ultrasonic arteriography |
| US4207772 | 11 Jul 1977 | 17 Jun 1980 | Mediscan, Inc. | Electronic drive system and technique for ultrasonic transducer |
| US4332018 | 1 Feb 1980 | 25 May 1982 | The United States of America as represented by the Secretary of the Navy | Wide band mosaic lens antenna array |
| US4344159 | 8 May 1981 | 10 Aug 1982 | Honeywell Inc. | Ultrasonic transducer |
| US4433400 | 24 Nov 1980 | 21 Feb 1984 | The United States of America as represented by the Department of Health and Human Services | Acoustically transparent hydrophone probe |
| US4446396 | 2 Sep 1982 | 1 May 1984 | The United States of America as represented by the Administrator of the National Aeronautics and Space Administration | Ultrasonic transducer with Gaussian radial pressure distribution |
| US4460987 | 22 Apr 1982 | 17 Jul 1984 | The United States of America as represented by the Secretary of the Navy | Variable focus sonar with curved array |
| US4517665 | 17 Nov 1983 | 14 May 1985 | The United States of America as represented by the Department of Health and Human Services | Acoustically transparent hydrophone probe |
| US4562900 | 20 Dec 1984 | 7 Jan 1986 | Varian Associates, Inc. | Lens system for acoustic transducer array |
| US7652952 | 2 Aug 2005 | 26 Jan 2010 | Johnson Outdoors Inc. | Sonar imaging system for mounting to watercraft |
| US7710825 | 9 Jan 2009 | 4 May 2010 | Johnson Outdoors Inc. | Side scan sonar imaging system with boat position on display |
| US7729203 | 9 Jan 2009 | 1 Jun 2010 | Johnson Outdoors Inc. | Side scan sonar imaging system with associated GPS data |
| US7755974 | 9 Jan 2009 | 13 Jul 2010 | Johnson Outdoors Inc. | Side scan sonar imaging system with enhancement |
| US7833158 | 13 Feb 2006 | 16 Nov 2010 | | Methods and apparatus for beamforming applications |
