Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822314 | Interlocking container and toy block sets | William M. Plachy | 1989-04-18 |
| 4753439 | Message type recording psychographs | — | 1988-06-28 |
| 4437413 | Folding structure employing a Sarrus linkage | Charles Phelan | 1984-03-20 |
| 4371167 | Psychographs with sound producing members | — | 1983-02-01 |
| 4365799 | Folding slide and platform structure | William M. Plachy | 1982-12-28 |
| 4198069 | Folding three-cornered vehicle | William M. Plachy | 1980-04-15 |