Kunizo Hiraoka

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for molding a concrete pipe
- Patent number 4,360,331
- Issue date Nov 23, 1982
- Hiraoka Giken Kogyo Co., Ltd.
- Kunizo Hiraoka
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Process for molding a concrete pipe
- Patent number 4,311,632
- Issue date Jan 19, 1982
- Hiraoka Giken Kogyo Co., Ltd.
- Kunizo Hiraoka
- B28 - WORKING CEMENT, CLAY, OR STONE