Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6599095 | Pump-off control method of pump jack | Takayuki Yamakawa, Hidetoshi Ryu, Tetsuo Kawano, Koji Kawamoto, Toshio Miyano +2 more | 2003-07-29 |
| 6511765 | Fuel cell system | Masataka Ueno, Kenji Kato, Munehisa Horiguchi | 2003-01-28 |