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1951-01-23 |
1954-06-15 |
Rola Company Inc |
Diaphragm for loud speakers
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*
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1953-03-02 |
1957-12-10 |
Rca Corp |
Loudspeaker structure
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1957-10-28 |
1960-02-02 |
Harold L Otto |
Speaker
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1968-03-06 |
1971-02-16 |
Hitachi Ltd |
Electroacoustic transducer
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USD244698S
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1976-03-03 |
1977-06-14 |
Babbco, Ltd. |
Loudspeaker cone
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1978-11-14 |
1982-04-13 |
James B. Lansing Sound, Inc. |
Diaphragm suspension construction
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JPS5613897A
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1979-07-13 |
1981-02-10 |
Toshiba Corp |
Supporting device for ring-shaped diaphragm
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1980-08-09 |
1982-10-12 |
Matsushita Electric Industrial Co., Ltd. |
Electro-dynamic speaker
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1985-03-13 |
1987-04-07 |
Jbl Incorporated |
Acoustic diaphragm
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1991-01-17 |
1994-07-21 |
エイデルマン、ロジャー・エイ |
improved hearing aids
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1995-04-05 |
1998-05-05 |
Carver Corporation |
Loud speaker structure
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2000-11-23 |
2002-05-29 |
Alfa Laval Flow Gmbh |
Membrane is provided with a surface structure formed by two families of crossing grooves or beads oriented at angles within a specified range to the radii drawn through the respective crossing points
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2000-12-29 |
2003-05-20 |
Mitek Corporation |
Low frequency loudspeaker driver having a polygonal diaphragm and method for mounting drivers in a tightly packed two-dimensional array
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GB2374753B
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2001-01-29 |
2004-12-22 |
Goodmans Loudspeakers Ltd |
Loudspeaker suspension
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2008-10-02 |
2020-09-17 |
Rolf Wissner |
Sealing device with a flexible membrane that can be deformed along a main surface
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2012-03-02 |
2013-03-19 |
Bose Corporation |
Diaphragm surround
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USD780159S1
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*
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2014-07-15 |
2017-02-28 |
Funktion One Research |
Loudspeaker
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2014-07-15 |
2017-02-28 |
Funktion One Research |
Loudspeaker
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USD769215S1
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2014-07-15 |
2016-10-18 |
Funktion One Research |
Loudspeaker
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GB2560496B
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2017-03-16 |
2021-09-29 |
Gp Acoustics Uk Ltd |
Loudspeaker driver surround
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2017-10-13 |
2018-08-13 |
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USD881846S1
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2017-12-06 |
2020-04-21 |
Tymphany Acoustic Technology (Huizhou) Co., Ltd. |
Vibration diaphragm for loudspeaker
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