| Patents for H04R 7 - Diaphragms for electromechanical transducers; Cones (6,555) |
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| 05/14/1985 | US4517416 Electro-acoustic transducer having a diaphragm comprising a layer of polymethacrylimide foam |
| 04/23/1985 | US4512435 Diaphragm for loudspeakers |
| 04/02/1985 | US4508192 Microphone diaphragm |
| 03/05/1985 | CA1183596A1 Diaphragm for loudspeaker |
| 01/31/1985 | WO1985000495A1 Integrated electroacoustic transducer |
| 01/29/1985 | US4496871 Parallel type piezoelectric bimorph vibrator |
| 01/02/1985 | CA1180437A Electro acoustic planar transducer |
| 01/01/1985 | US4491698 Electro-acoustic transducer with diaphragm and blank therefor |
| 12/11/1984 | US4488012 MFB Loudspeaker |
| 12/11/1984 | US4488010 Loudspeaker |
| 12/11/1984 | US4487877 Diaphragm for loudspeaker |
| 12/05/1984 | EP0126841A2 Loudspeaker diaphragm |
| 11/27/1984 | US4484383 Method of manufacturing a speaker diaphragm |
| 10/31/1984 | EP0123359A1 Electroacoustic transducer unit with reduced resonant frequency and mechanical spring with negative stiffness, preferably used in such a transducer unit |
| 10/23/1984 | US4478309 Speaker equipped with diaphragm filled with foamed resin |
| 10/17/1984 | EP0121555A1 Diaphragm stretching apparatus |
| 10/16/1984 | US4477699 Mechanical two-way loudspeaker |
| 10/02/1984 | CA1175549A1 Sonic transducer having diaphragm tensioning spring directly attached to diaphragm |
| 09/26/1984 | EP0119897A1 Apparatus for holding a piezo-electric diaphragm, method of realizing the same, and an electromechanical transducer using said apparatus |
| 09/25/1984 | US4473721 High-frequency loud speaker |
| 09/18/1984 | US4472543 Flame retardant diaphragm for acoustic transducers |
| 09/11/1984 | US4471085 Diaphragm material for loudspeakers |
| 09/11/1984 | US4471084 Diaphragm for loudspeakers |
| 09/11/1984 | US4471028 Beryllium thin plates by jetting and rapidly cooling a melt; workability |
| 09/11/1984 | US4470479 Method of making metal coated foil speaker diaphragm |
| 08/29/1984 | EP0116957A1 Ribbon speaker system |
| 08/14/1984 | CA1172744A1 Speaker unit for headphones |
| 07/24/1984 | US4461930 Acoustic transducer with honeycomb diaphragm |
| 07/17/1984 | US4460060 Vibratory diaphragm for loudspeaker |
| 07/04/1984 | EP0112383A1 Electro-acoustic transducer with diaphragm. |
| 05/29/1984 | US4451609 Flame-retarded acoustic diaphragm |
| 05/02/1984 | EP0107136A2 Swinging bodies, in particular resonating bodies for sound generating devices |
| 05/01/1984 | CA1166741A1 Narrow-frequency band acoustic transducer |
| 04/26/1984 | WO1984001683A1 Diaphragm stretching apparatus |
| 04/25/1984 | EP0106631A1 Ceramic microphone |
| 04/03/1984 | US4440983 Electro-acoustic transducer with active dome |
| 04/03/1984 | US4440259 Loudspeaker system for producing coherent sound |
| 03/06/1984 | CA1163355A1 Mechanical filter for an electrodynamic transducer |
| 02/21/1984 | US4433214 Acoustical transducer with a slotted piston suspension |
| 01/31/1984 | US4429068 Rubber material |
| 01/31/1984 | US4428996 Diaphragm for speaker |
| 01/25/1984 | EP0098895A1 Rigid diaphragm transducer with plural coils |
| 01/24/1984 | US4427846 Moving coil loudspeakers |
| 01/05/1984 | WO1984000093A1 Electro-acoustic transducer with diaphragm and blank therefor |
| 12/27/1983 | CA1159374A1 Diaphragm suspension construction |
| 12/20/1983 | CA1158987A1 Electro-acoustic transducer with active dome |
| 11/08/1983 | US4414436 Narrow-frequency band acoustic transducer |
| 11/02/1983 | EP0092956A2 Narrow-frequency band acoustic transducer |
| 11/01/1983 | US4413160 Ribbon-type loudspeaker |
| 10/25/1983 | US4412103 Diaphragm for an electro-acoustic transducer |
| 10/18/1983 | US4410768 Electro-acoustic transducer |
| 10/04/1983 | US4407852 Volumetric space charge |
| 09/21/1983 | EP0089054A2 Diaphragm for loudspeakers |
| 09/13/1983 | US4404315 Molding compositions and diaphragms, arm pipes and head shells molded therefrom |
| 09/06/1983 | US4403117 Sonic transducer having diaphragm tensioning spring directly attached to diaphragm |
| 08/31/1983 | EP0087177A1 Electro-acoustic transducer having a diaphragm comprising a layer of polymethacrylimide foam |
| 08/31/1983 | EP0086837A1 Vibrating plate for speaker |
| 08/30/1983 | US4401858 Method for controlling wrinkles in a vibratile diaphragm |
| 08/16/1983 | US4399334 Speaker unit for headphones |
| 08/16/1983 | US4399179 For writing, pet and pet copolymer |
| 08/02/1983 | US4395814 Acoustic vibrating element of graphite and method of manufacturing same |
| 07/26/1983 | US4395598 Electro-acoustic transducer causing sound waves to be in phase at any point by preventing reflection from the back end of the diaphragm to stress applying means |
| 07/26/1983 | US4395597 Speaker diaphragm assembly and a method of manufacturing the same |
| 07/05/1983 | US4392027 Method and apparatus for providing a uniform sound distribution in an aircraft cabin |
| 06/22/1983 | EP0082086A1 Loudspeaker diaphragm and method for its manufacture |
| 06/14/1983 | US4387788 Diaphragm pressure ring for tone generators |
| 06/14/1983 | US4387787 Loudspeaker having acoustic impedance frontal loading element |
| 05/17/1983 | US4384174 Moving voice coil loudspeaker, peripheral diaphragm support, diaphragm construction, bobbin to diaphragm reinforcement |
| 04/20/1983 | EP0077228A2 Electroacoustic transducer |
| 04/12/1983 | US4379952 Mechanical filter for an electrodynamic transducer |
| 04/12/1983 | US4379951 Electro-acoustic transducer means |
| 04/06/1983 | EP0075911A1 Loudspeaker, in particular a tweeter |
| 04/05/1983 | US4379213 Electroacoustical converter |
| 03/31/1983 | WO1983001171A1 Loudspeaker, particularly tweeter |
| 03/29/1983 | CA1143663A1 Loudspeaker having a unitary mechanical-acoustic diaphragm termination |
| 03/22/1983 | US4377617 Loudspeaker diaphragm and process for producing same |
| 03/03/1983 | WO1983000791A1 Vibrating plate for speaker |
| 03/02/1983 | EP0072991A2 Speaker system |
| 02/17/1983 | WO1983000594A1 Loudspeaker system for producing coherent sound |
| 02/16/1983 | EP0072206A1 Loudspeaker system for producing coherent sound |
| 02/15/1983 | US4373607 Loudspeaker cone stiffeners |
| 02/08/1983 | CA1141020A1 Electrets from plasma polymerized material |
| 01/05/1983 | EP0068285A1 Speaker equipped with diaphragm filled with foamed resin |
| 12/28/1982 | US4366205 Kneaded mixture of polypropylene, polymethyl methacrylate and graphite flakes |
| 12/21/1982 | CA1138090A1 Method and device for controlling wrinkles in a vibratile diaphragm |
| 12/15/1982 | EP0066713A1 An electroacoustical transducer and a method for assembling same |
| 12/14/1982 | CA1137618A1 Voice coil bobbin connection to loudspeaker diaphragm of honeycomb core sandwiched by sheets |
| 12/08/1982 | EP0066027A1 Diaphragm, particularly for an electro-acoustic transducer |
| 12/07/1982 | US4362772 Vibratory elements for audio equipment |
| 12/01/1982 | EP0065883A2 Ring radiator for loudspeakers |
| 12/01/1982 | EP0065882A2 Radiating domes for loudspeakers |
| 11/23/1982 | CA1136261A1 Loudspeaker and a method of producing the same |
| 11/16/1982 | US4359132 High performance speaker diaphragm |
| 10/20/1982 | EP0063094A1 Tweeter |
| 10/13/1982 | EP0062201A1 Electro-acoustic transducer |
| 10/12/1982 | US4354066 Rigid-diaphragm transducer with plural coils |
| 10/12/1982 | US4353432 Electro-dynamic speaker |
| 10/05/1982 | US4352407 Diaphragms for acoustic instruments and method of producing the same |
| 09/29/1982 | EP0061270A1 Diaphragm for an electro-acoustic transducer |
| 09/28/1982 | US4352039 Sonic transducer |