Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7509930 | Internal combustion barrel engine | — | 2009-03-31 |
| 6160895 | Hearing aid system with acoustical horn | — | 2000-12-12 |
| D417279 | Acoustical horn for behind-the-ear hearing aid | — | 1999-11-30 |
| 5248272 | Forwards facing rowing apparatus with feathering of the oar blades | — | 1993-09-28 |
| 4943250 | Articulated hydrofoil oar | — | 1990-07-24 |
| 4867718 | Hydrofoil oar | — | 1989-09-19 |
| 4867719 | Hydrofoil oar with movable outrigger | — | 1989-09-19 |
| 4776821 | Forwards facing hydrofoil oar | — | 1988-10-11 |