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Plastic lens
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Issue date Mar 5, 1996
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Nippon Sheet Glass Co., Ltd.
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Shoji Mase
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G02 - OPTICS
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Process for producing plastic lens
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Patent number 5,310,577
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Issue date May 10, 1994
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Nippon Sheet Glass Co., Ltd.
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Shoji Mase
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Light control sheets
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Patent number 5,108,857
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Issue date Apr 28, 1992
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Sumitomo Chemical Company, Limited
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Shinichiro Kitayama
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G02 - OPTICS
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Laminated structure
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Patent number 4,956,227
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Issue date Sep 11, 1990
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Nippon Sheet Glass Co., Ltd.
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Naoto Hirayama
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B32 - LAYERED PRODUCTS
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Plastic multifocal point spherical lens
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Patent number 4,944,584
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Issue date Jul 31, 1990
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Nippon Sheet Glass Co., Ltd.
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Koichi Maeda
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Light control sheets
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Patent number 4,929,523
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Issue date May 29, 1990
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Sumitomo Chemical Company Limited
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Shinichiro Kitayama
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G02 - OPTICS
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Laminated structure
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Patent number 4,925,737
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Issue date May 15, 1990
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Nippon Sheet Glass Co., Ltd.
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Tsuyoshi Baba
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B32 - LAYERED PRODUCTS
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Coating composition
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Patent number 4,394,177
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Issue date Jul 19, 1983
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Sumitomo Chemical Company, Limited
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Akira Fujioka
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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