Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6394877 | Bed lifting mechanism for model truck | — | 2002-05-28 |
| 4798016 | Picture pen | William M. Martz | 1989-01-17 |
| 4526371 | Spelling game | — | 1985-07-02 |
| D256816 | Toy glider | John F. McMahon | 1980-09-09 |
| D256139 | Electronic game casing | Samuel T. Kjellman, Robert O. Doyle | 1980-07-29 |
| 4197439 | Touch-responsive indicator switch | Alfred C. Mecklenburg | 1980-04-08 |