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Negative resistance device
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Patent number 4,053,798
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Issue date Oct 11, 1977
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Matsushita Electronics Corporation
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Susumu Koike
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G11 - INFORMATION STORAGE
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Touch-operation switch
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Patent number 3,991,329
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Issue date Nov 9, 1976
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Matsushita Electric Industrial Co., Ltd.
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Hitoo Iwasa
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H03 - BASIC ELECTRONIC CIRCUITRY
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Negative-resistance semiconductor device
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Patent number 3,989,962
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Issue date Nov 2, 1976
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Matsushita Electronics Corporation
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Hiromitsu Takagi
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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