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Electronic timepiece
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Patent number 4,223,526
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Issue date Sep 23, 1980
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Tokyo Shibaura Electric Co., Ltd.
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Teruaki Tanaka
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G04 - HOROLOGY
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Electronic calculator
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Patent number 4,120,040
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Issue date Oct 10, 1978
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Tokyo Shibaura Electric Company, Ltd.
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Mitsuo Aihara
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G06 - COMPUTING CALCULATING COUNTING
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Clock pulse generating apparatus
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Patent number 4,101,838
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Issue date Jul 18, 1978
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Tokyo Shibaura Electric Co., Ltd.
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Mitsuo Aihara
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H03 - BASIC ELECTRONIC CIRCUITRY