Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5803234 | Roller drive system for vehicle conveyor | Michael Graf | 1998-09-08 |
| 5111839 | Airplane toilet drain valve assembly | David Schroepfer | 1992-05-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5803234 | Roller drive system for vehicle conveyor | Michael Graf | 1998-09-08 |
| 5111839 | Airplane toilet drain valve assembly | David Schroepfer | 1992-05-12 |