Hakusan Seisakusho Co., Ltd.

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Small-sized gas pressure welding machine for rails with two separat...
- Patent number 4,762,263
- Issue date Aug 9, 1988
- Hakusan Seisakusho Co., Ltd.
- Hirotsugu Oishibashi
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Gas pressure welding machine
- Patent number 4,576,324
- Issue date Mar 18, 1986
- Japanese National Railways
- Tadashi Takimoto
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of field welding head-hardened rails
- Patent number 4,556,164
- Issue date Dec 3, 1985
- Japanese National Railways
- Hirotsugu Oishibashi
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Butt welding and burr shearing machine for reinforce steel
- Patent number 4,272,003
- Issue date Jun 9, 1981
- Japanese National Railways
- Hirotsugu Oishibashi
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR