Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7287580 | Heat exchanger | — | 2007-10-30 |
| 7096934 | Heat exchanger | — | 2006-08-29 |
| 6702552 | Impeller having blade(s) conforming to the golden section of a logarithmic curve | — | 2004-03-09 |
| 5934877 | Rotor with logarithmic scaled shape | — | 1999-08-10 |
| 5517939 | Thermoplastic bottom inflatable boat | Amanda L. Gruhn | 1996-05-21 |
| D334912 | Boat | — | 1993-04-20 |