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1924-06-17 |
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Lee W Esterbrook |
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1925-06-22 |
1927-08-30 |
Charles G Wieland |
Telephone diaphragm
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1926-04-28 |
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1930-10-07 |
1933-02-07 |
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1932-02-19 |
1935-02-05 |
Neville Athol Ernest |
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1955-12-30 |
1960-02-09 |
Gen Electric |
Double cone loudspeaker
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1958-01-17 |
1961-03-14 |
Philco Corp |
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1959-10-12 |
1962-02-06 |
Waitus A O'bryant |
Filter for heating and air conditioning ducts
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1961-12-12 |
1964-04-14 |
Standard Mfg Company |
Evaporator panels
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1962-06-08 |
1965-07-13 |
Electro Voice |
Loudspeaker system
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1964-02-05 |
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Electronic Res Associates Inc |
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1965-09-08 |
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1970-12-23 |
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Electromagnetic transducer
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1971-05-28 |
1975-12-04 |
Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka |
Diaphragm for electroacoustic transducers and process for their manufacture
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1973-09-04 |
1975-07-01 |
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1973-10-21 |
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1974-01-24 |
1975-08-05 |
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Dynamic electroacoustic transducer
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1976-01-27 |
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Electrostatic loudspeaker element
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1974-07-17 |
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Speaker headrest for motor vehicles
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1975-05-30 |
1976-12-03 |
Pioneer Electronic Corp |
Vibration member for acoustic convertor
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1976-10-22 |
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1977-06-27 |
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Loire Electronique |
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Electro-Voice, Inc. |
Loudspeaker and horn therefor
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Grosh Scenic Studios, Inc. |
Portable acoustical panel structure
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Grill for a vent
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Sony Corporation |
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Women's headband its method of construction
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Loudspeaker with differentiated energy distribution in vertical and horizontal planes
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Harman International Industries, Inc. |
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Genelec Oy |
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