Yasumasa Hayashida

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Patents Grantslast 30 patents

Information Patent Grant
Expansion joint for use in constructing concrete structures
- Patent number 5,044,835
- Issue date Sep 3, 1991
- Asahi Denka Kogyo Kabushiki Kaisha
- Takuo Fukushima
- E04 - BUILDING
Information Patent Grant
Device for filling up of recess left in concrete wall after removal
- Patent number 4,905,429
- Issue date Mar 6, 1990
- Denka Kogyo Kabushiki Kaisha
- Takuo Fukushima
- E04 - BUILDING
Information Patent Grant
Waterstop for concrete form separator
- Patent number 4,889,312
- Issue date Dec 26, 1989
- Asahi Denka Kogyo Kabushiki Kaisha
- Sunoo Ogou
- E04 - BUILDING
Information Patent Grant
Water swellable sealant
- Patent number 4,816,509
- Issue date Mar 28, 1989
- Asahi Denka Kogyo K.K.
- Takuo Fukushima
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...