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1934-12-04 |
1935-07-23 |
Hickok Mfg Co Inc |
Reversible belt
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1954-01-18 |
1957-02-26 |
Lockheed Aircraft Corp |
Noise attenuating ear protectors
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1961-09-22 |
1963-09-24 |
Palmaer Tore Georg |
Connecting mechanism between a headstrap and devices connected to it
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1966-02-04 |
1970-01-06 |
Telex Corp The |
Earphone housing with offset opening for sound quality variation
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1966-08-25 |
1968-11-05 |
American Optical Corp |
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1966-08-25 |
1969-04-29 |
American Optical Corp |
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1975-05-12 |
1978-01-24 |
Tore Georg Palmaer |
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1976-06-11 |
1977-05-10 |
Koss Corporation |
Headphone
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1986-01-10 |
1988-11-22 |
Leif Palmaer |
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1990-08-07 |
1992-07-21 |
Sony Corporation |
Headphone
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1990-08-13 |
1993-05-11 |
Matsushita Electric Industrial Co., Ltd. |
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1990-11-02 |
1994-06-20 |
Peltor Ab |
Ear cover for ear protectors or headphones
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1992-08-28 |
1994-12-27 |
Sony Corporation |
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1992-10-29 |
2000-05-22 |
Peltor Ab |
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1993-02-03 |
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1996-04-01 |
2001-12-25 |
Bose Corporation |
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1997-02-18 |
1998-12-22 |
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1997-08-15 |
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