Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4738622 | Removable denture retaining structure | Haruyuki Kawahara, Hiroki Wada, Takashi Tsutsumi | 1988-04-19 |
| 4731020 | Removable denture retaining structure | Haruyuki Kawahara, Hiroki Wada, Takashi Tsutsumi | 1988-03-15 |