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Linear actuator
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Patent number 4,757,223
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Issue date Jul 12, 1988
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Dainippon Screen Mfg. Co., Ltd.
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Tsutomu Ueyama
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Piezoelectric motor
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Patent number 4,743,792
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Issue date May 10, 1988
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Dainippon Screen Mfg. Co., Ltd.
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Tsutomu Ueyama
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Film end holding device
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Patent number 4,707,123
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Issue date Nov 17, 1987
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Dainippon Screen Mfg. Co., Ltd.
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Tsutomu Ueyama
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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