Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7272870 | Secondary introduction of fluid into vacuum system | Paul M. Pierce, Frederick A. Hekman | 2007-09-25 |
| 6837546 | Office chair | Douglas M. VanDeRiet | 2005-01-04 |
| 6758523 | Office chair | Douglas M. VanDeRiet | 2004-07-06 |
| 6644749 | Office chair | Douglas M. VanDeRiet | 2003-11-11 |
| D460870 | Office chair | Douglas M. Van De Riet, Jason W. Carpenter, Jeff Weber, Todd David Krupiczewicz | 2002-07-30 |
| D456160 | Chair | Douglas M. Van De Riet, Jason W. Carpenter, Jeff Weber, Todd David Krupiczewicz | 2002-04-30 |
| D449172 | Chair | Douglas M. Van De Riet, Jason W. Carpenter, Jeff Weber, Todd David Krupiczewicz | 2001-10-16 |
| 5820009 | Articulated surgical instrument with improved jaw closure mechanism | Hugh Melling, Christopher L. Johnson | 1998-10-13 |
| 5797537 | Articulated surgical instrument with improved firing mechanism | Christopher L. Johnson, David A. Dunlap | 1998-08-25 |
| 5725536 | Articulated surgical instrument with improved articulation control mechanism | Mark A. Penrod | 1998-03-10 |
| 5562682 | Surgical Instrument with adjustable arms | Randall J. Hoyt | 1996-10-08 |