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Tape recorder
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Patent number 4,546,399
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Issue date Oct 8, 1985
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Olympus Optical Company Limited
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Kenji Furuta
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G11 - INFORMATION STORAGE
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Magnetic reproducing apparatus
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Patent number 4,459,624
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Issue date Jul 10, 1984
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Olympus Optical Company Limited
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Masaaki Sato
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Magnetic reproducing apparatus
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Patent number 4,366,514
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Issue date Dec 28, 1982
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Olympus Optical Company Limited
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Masaaki Sato
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Tape recorder with display
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Patent number 4,322,765
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Issue date Mar 30, 1982
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Olympus Optical Co. Ltd.
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Kenji Furuta
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G11 - INFORMATION STORAGE