Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6270140 | Removable seat | John G Opfer, Terrence Duncan, Leslie Griswold, David G. Anticuar | 2001-08-07 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6270140 | Removable seat | John G Opfer, Terrence Duncan, Leslie Griswold, David G. Anticuar | 2001-08-07 |