Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5303514 | Rail grinding apparatus | Hirotsugu Oishibashi, Soji Fujimori, Haruo Yokoyama, Akihiro Hosokawa, Kosuke Nagai +1 more | 1994-04-19 |
| 4762263 | Small-sized gas pressure welding machine for rails with two separate mechanisms for punching-shearing excess metal | Hirotsugu Oishibashi, Kenzo Hagiwara, Hisashi Yoshida, Kunio Kitagawa, Kimio Shimizu | 1988-08-09 |
| 4576324 | Gas pressure welding machine | Tadashi Takimoto, Hirotsugu Oishibashi, Katsuyoshi Ueyama, Akio Kobayashi, Keiichi Aoki +2 more | 1986-03-18 |
| 4556164 | Method of field welding head-hardened rails | Hirotsugu Oishibashi, Katsuyoshi Ueyama, Mitsuo Nakamura, Takeo Aichi, Shigeru Sasaki | 1985-12-03 |
| 4416158 | Punching-shearing method for inspecting quality of butt welded joint | Tadashi Takimoto, Hirotsugu Oishibashi, Katsuyoshi Ueyama, Mitsuo Nakamura, Takayoshi Amano | 1983-11-22 |
| 4272003 | Butt welding and burr shearing machine for reinforce steel | Hirotsugu Oishibashi, Katsuyoshi Ueyama, Mitsuo Nakamura, Takayoshi Amano | 1981-06-09 |