Hiroharu Sasayama

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Patents Grantslast 30 patents

Information Patent Grant
Water-swellable caulking material for water-leakage prevention
- Patent number 4,756,952
- Issue date Jul 12, 1988
- C. I. Kasei Co., Ltd.
- Hiroharu Sasayama
- E04 - BUILDING
Information Patent Grant
Waterstop
- Patent number 4,740,404
- Issue date Apr 26, 1988
- C. I. Kasei, Co. Ltd.
- Shozo Otsugu
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Process for the preparation of self-swelling leakage-preventing mat...
- Patent number 4,211,851
- Issue date Jul 8, 1980
- C.I. Kasei Company Limited
- Hiroharu Sasayama
- F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
Information Patent Grant
Process for the production of self-swelling leakage-preventing mate...
- Patent number 4,155,957
- Issue date May 22, 1979
- C. I. Kasei Company, Limited
- Hiroharu Sasayama
- F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS