| Patents for G10K 13 - Cones, diaphragms, or the like, for emitting or receiving sound in general (442) |
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| 02/16/1982 | US4315557 Diaphragm for electro-acoustic transducer |
| 02/04/1982 | WO1982000380A1 Method and device for generating and radiating ultrasonic energy |
| 02/03/1982 | EP0007916B1 Underwater communications device |
| 01/27/1982 | EP0044800A2 Device and process for the creation and the emission of ultrasonic energy |
| 12/29/1981 | US4308094 Diaphragm for speaker and method of producing same |
| 07/23/1981 | WO1981002072A1 Variable thickness a acoustic diaphragm,voice coil arrangements for electroacoustic transducers |
| 06/16/1981 | US4273900 Diaphragm for acoustic equipment |
| 06/02/1981 | US4271498 Watch |
| 05/05/1981 | CA1100665A1 Diaphragm for acoustic equipment |
| 04/07/1981 | CA1098774A1 Acoustic diaphragm with polyurethane elastomer coating |
| 03/24/1981 | US4257325 Mouting of a substantially planar diaphragm defining a sound transducer |
| 11/11/1980 | US4233679 Adjustable piezoelectric transducer for a watch |
| 09/09/1980 | US4221773 Blending and carbonizing graphite powder and thermoplastic resin |
| 06/10/1980 | US4206830 Vehicle speaker system provided with a passive radiator |
| 04/08/1980 | US4196895 Ring-loaded flexural disc spring |
| 04/08/1980 | US4196789 Protection by underwater sound waves |
| 03/04/1980 | US4191944 Electromagnetic sound generator and method of making same |
| 01/22/1980 | US4184563 Planar diaphragm and supporting frame assembly |
| 01/15/1980 | US4183422 Underwater communications device |
| 09/11/1979 | US4167223 Mechanically operable acoustic filter |
| 08/09/1979 | WO1979000497A1 Underwater communications device |
| 08/07/1979 | CA1060120A1 Sonic transducer |
| 02/20/1979 | US4140203 Tetramethylene glycol, ethylene glycol, diphenylmethane diisocyanate/4,4*-/, polyetherurethane copolymers, frequency response, efficiency, tensile strength, loudspeakers |
| 01/23/1979 | US4135601 Boron coated diaphragm for use in a loud speaker |
| 01/16/1979 | US4134200 Method of making an electromagnetic sound generator |
| 12/26/1978 | US4131180 Speaker system |
| 10/31/1978 | US4122797 Ultrasonic sound source and method for manufacturing rectangular diaphragm of ultrasonic sound source |
| 05/16/1978 | US4090041 Electromagnetic sonic generator for an alarm |
| 02/14/1978 | US4073366 Disposable noise reducing hearing aid attachment |
| 09/20/1977 | US4050056 Electroacoustic transducer design for eliminating phantom target errors in sound ranging systems |
| 09/13/1977 | US4048454 Sonic transducer employing rigid radiating member |
| 08/02/1977 | US4039998 Ultrasonic transmitter or receiver |
| 07/05/1977 | US4033180 Ultrasonic microphone for operating with an accumulated layer of mud over its vibratile surface without change in sensitivity within its prescribed frequency range |
| 05/31/1977 | US4026384 Reconstituted mica acoustic diaphragm |
| 01/18/1977 | US4003449 Planar diaphragm |
| 12/28/1976 | US3999845 Mechanical sound reproducing means for an audio-visual device |
| 12/14/1976 | US3997023 Loudspeaker with improved surround |
| 09/14/1976 | US3980154 Cabinet for improving the sound output of an amplifier |
| 03/09/1976 | US3943388 Electroacoustic transducer of the flexural vibrating diaphragm type |
| 02/24/1976 | US3939942 Electroacoustic transducers |
| 02/17/1976 | US3939467 Transducer |
| 02/03/1976 | US3935924 Vibratory material of paper pulp and carbon fibers |