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Tape recorder
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Patent number 4,236,681
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Issue date Dec 2, 1980
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Olympus Optical Co., Ltd.
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Akira Osanai
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G11 - INFORMATION STORAGE
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Cassette type tape recorder
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Patent number 4,188,647
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Issue date Feb 12, 1980
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Tanashin Denki Co., Ltd.
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Shinsaku Tanaka
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G11 - INFORMATION STORAGE
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Tape cassette player
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Patent number 4,065,800
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Issue date Dec 27, 1977
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General Motors Corporation
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James R. Wilson
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G11 - INFORMATION STORAGE
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Cassette tape recorders
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Patent number 4,044,391
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Issue date Aug 23, 1977
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Fulton Electronic Industry, Ltd.
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Akira Takahashi
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G11 - INFORMATION STORAGE
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3896493
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Patent number 3,896,493
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Issue date Jul 22, 1975
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G11 - INFORMATION STORAGE
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3813057
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Patent number 3,813,057
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Issue date May 28, 1974
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G11 - INFORMATION STORAGE
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3724778
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Patent number 3,724,778
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Issue date Apr 3, 1973
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G11 - INFORMATION STORAGE
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3614109
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Patent number 3,614,109
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Issue date Oct 19, 1971
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G11 - INFORMATION STORAGE
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3608908
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Patent number 3,608,908
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Issue date Sep 28, 1971
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G11 - INFORMATION STORAGE
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3604714
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Patent number 3,604,714
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Issue date Sep 14, 1971
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G11 - INFORMATION STORAGE
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3603595
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Patent number 3,603,595
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Issue date Sep 7, 1971
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G11 - INFORMATION STORAGE