Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4371166 | Cylindrical puzzle | Martin M. Trossman, Charles R. Luchsinger | 1983-02-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4371166 | Cylindrical puzzle | Martin M. Trossman, Charles R. Luchsinger | 1983-02-01 |