Yosiaki Okumura

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Iwaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Main body of grinding assembly for use in track rail joint grinding...
- Patent number 6,139,410
- Issue date Oct 31, 2000
- Tohokugiken Industries Co., Ltd.
- Yosiaki Okumura
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Grinding apparatus of welded residue on seam of rail head
- Patent number 5,577,954
- Issue date Nov 26, 1996
- Tohokugiken Industries Co., Ltd.
- Yosiaki Okumura
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES