Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861309 | Spiral cylinder toy | Lawrence B. Grubb | 1989-08-29 |
| D299935 | Mobile element | Lois E. Kelly, David Schweitzer, John Piszko, George Lopac | 1989-02-21 |
| D299936 | Support for toy mobile | Lois E. Kelly, David Schweitzer, John Piszko, George Lopac | 1989-02-21 |