Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4700648 | Propelled pontoon chair | Marian J. Trefethern | 1987-10-20 |
| 4480568 | Propelled pontoon chair | Marian J. Bissell | 1984-11-06 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4700648 | Propelled pontoon chair | Marian J. Trefethern | 1987-10-20 |
| 4480568 | Propelled pontoon chair | Marian J. Bissell | 1984-11-06 |