Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824099 | Rotating amusement device | David O'Connor, Walter C. Cadwallader, Michael de Champlain, Ulf Ottho | 1989-04-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824099 | Rotating amusement device | David O'Connor, Walter C. Cadwallader, Michael de Champlain, Ulf Ottho | 1989-04-25 |