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Borescope apparatus
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Patent number 4,991,957
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Issue date Feb 12, 1991
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Olympus Optical Co., Ltd.
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Nobuyuki Sakamoto
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Stone disintegrator apparatus
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Patent number 4,722,340
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Issue date Feb 2, 1988
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Olympus Optical Co., Ltd.
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Syuichi Takayama
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Magnetographic apparatus
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Patent number 4,232,323
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Issue date Nov 4, 1980
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Iwatsu Electric Co., Ltd.
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Norio Kokaji
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY