Junichi Hirai

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Cylinder lock device for use in structure
- Patent number 5,147,018
- Issue date Sep 15, 1992
- Kajima Corporation
- Takuji Kobori
- E04 - BUILDING
Information Patent Grant
Active seismic response control system for use in structure
- Patent number 5,065,552
- Issue date Nov 19, 1991
- Kajima Corporation
- Takuji Kobori
- E04 - BUILDING
Information Patent Grant
Variable damping and stiffness structure
- Patent number 5,036,633
- Issue date Aug 6, 1991
- Kajima Corporation
- Takuji Kobori
- E04 - BUILDING