Patents per Year
Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 7219819 | Self-venting valve | J Wayne Halfacre, John S. Gruver, Christian Randhahn, Charles A. Curtiss, Stuart Leslie +1 more | 2007-05-22 | |
| D526563 | Valve | J. Wayne Halfacre, John S. Gruver, Christian Randhahn, Charles A. Curtiss, Stuart Leslie +1 more | 2006-08-15 | |
| D519370 | Valve with dust cover | J. Wayne Halfacre, John S. Gruver, Christian Randhahn, Charles A. Curtiss, Stuart Leslie +1 more | 2006-04-25 | |
| D516423 | Dust cover for a valve | J. Wayne Halfacre, John S. Gruver, Christian Randhahn, Charles A. Curtiss, Stuart Leslie +1 more | 2006-03-07 | |
| D497550 | Beverage container | J. Wayne Halfacre, John S. Gruver, Christian Randhahn, Charles A. Curtiss, Stuart Leslie | 2004-10-26 | |
| D485493 | Beverage container | J. Wayne Halfacre, John S. Gruver, Christian Randhahn, Charles A. Curtiss, Stuart Leslie | 2004-01-20 | |
| 5892314 | Piezoelectric circuit | Frank Everett Sager, William Claude Robertson | 1999-04-06 | $5,340,000 |
| 5798600 | Piezoelectric pumps | Frank Everett Sager | 1998-08-25 | $2,665,000 |