Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7190448 | Surface inspecting apparatus | Kouji Ohsawa, Katsuhiro Natsume, Takahiro Miura | 2007-03-13 |
| 6631788 | Elevator system with safety installation | Masahiro Shikai, Hajime Nakajima, Toshiro Nakashima, Kazuo Takashima, Shigeki Yamakawa +4 more | 2003-10-14 |
| 6230845 | Moveable control panel for elevators | Shigeki Yamakawa, Hiroyuki Takagi, Junichiro Ishikawa, Seiji Okuda, Tomohiko Yao | 2001-05-15 |
| 6223860 | Control device for elevator | Yasuhiro Namba, Shigeki Yamakawa, Takehiko Kubota | 2001-05-01 |