Keiji Hirai

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Kanda-machi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Screw-type rebar joint structure of deformed rebar and manufacturin...
- Patent number 11,274,446
- Issue date Mar 15, 2022
- Kozo Wakiyama
- E04 - BUILDING
Information Patent Grant
Reinforcing bar
- Patent number D743581
- Issue date Nov 17, 2015
- Kozo Wakiyama
- D25 - Building units and construction elements

Patents Applicationslast 30 patents

Information Patent Application
STEEL REINFORCED JOINT, STEEL REINFORCED ASSEMBLY, AND PRECAST STEE...
- Publication number 20220127838
- Publication date Apr 28, 2022
- Akira Fukuda
- E04 - BUILDING
Information Patent Application
SCREW-TYPE REBAR JOINT STRUCTURE OF DEFORMED REBAR AND MANUFACTURIN...
- Publication number 20190177976
- Publication date Jun 13, 2019
- Kozo Wakiyama
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
THREADED REINFORCING BAR COUPLING FOR DEFORMED REINFORCING BAR, AND...
- Publication number 20150037090
- Publication date Feb 5, 2015
- Kozo Wakiyama
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...