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Endoscope
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Patent number 4,872,740
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Issue date Oct 10, 1989
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Mitsubishi Rayon Company, Ltd.
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Hiromu Terada
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Multifilament type plastic optical fiber
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Patent number 4,768,857
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Issue date Sep 6, 1988
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Mitsubishi Rayon Company Ltd.
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Kenichi Sakunaga
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Plastic optical fibers
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Patent number 4,762,392
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Issue date Aug 9, 1988
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Mitsubishi Rayon Co., Ltd.
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Takashi Yamamoto
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL