Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6378941 | 30/40/30 split seat with adjustable center portion | John G Opfer, Leslie Griswold, Mark Caye, Anthony J. DiSalvo, Kurt A. Seibold +1 more | 2002-04-30 | $43,523,000 |
| 6270140 | Removable seat | John G Opfer, Leslie Griswold, David G. Anticuar, Lawrence A. Fieroh | 2001-08-07 | $25,588,000 |