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Compact zoom lens
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Patent number 5,229,887
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Issue date Jul 20, 1993
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Nikon Corporation
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Kiyoshi Hayashi
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G02 - OPTICS
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Relief valve
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Patent number 5,050,635
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Issue date Sep 24, 1991
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Tokyo Keiko Co., Ltd.
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Hidetoshi Tetsuka
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Remote control poppet valve
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Patent number 4,779,837
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Issue date Oct 25, 1988
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Tokyo Keiki Co., Ltd.
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Akio Mito
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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Pulse motor control apparatus
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Patent number 4,528,491
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Issue date Jul 9, 1985
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Tokyo Keiki Company, Ltd.
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Kunihiko Takeuchi
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G05 - CONTROLLING REGULATING