Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6499690 | Rotor blade flap drive apparatus | Noriaki Katayama, Eiichi Yamakawa | 2002-12-31 |
| 6273681 | Rotor blade flap driving apparatus | Eiichi Yamakawa | 2001-08-14 |
| 6109870 | Rotor blade flap driving apparatus | Eiichi Yamakawa, Mitsumasa Sato, Shun-ichi Bandoh | 2000-08-29 |