Katunari Konishi

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Himeji, JP

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Patents Grantslast 30 patents

Information Patent Grant
Spring rail frog
- Patent number 6,138,958
- Issue date Oct 31, 2000
- Yamato Kogyo Co., Ltd.
- Takaaki Irie
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Spring rail frog having bendable rail with modified cross-section
- Patent number 5,782,437
- Issue date Jul 21, 1998
- Yamato Kogyo Co., Ltd.
- Takaaki Irie
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES