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Ryoji Nagamine
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Saitama, JP
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last 30 patents
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Patent Grant
Apparatus for producing polyurethane foam
Patent number
4,988,271
Issue date
Jan 29, 1991
Human Industry Corporation
Sadao Kumasaka
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Asphalt impregnated foam and method of producing the same
Patent number
4,610,922
Issue date
Sep 9, 1986
Human Industry Corporation
Sadao Kumasaka
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Patent Grant
Apparatus for continuous production of a slab of polyurethane foam
Patent number
4,348,164
Issue date
Sep 7, 1982
Toyo Rubber Chemical Industrial Corporation
Osamu Fujii
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL