Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5301589 | Violin bow guide | Robert J. Spadafora, Philipp Kraemer | 1994-04-12 |
| 4959978 | Programmable pushbutton combination lock | Mitchell G. Cappell | 1990-10-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5301589 | Violin bow guide | Robert J. Spadafora, Philipp Kraemer | 1994-04-12 |
| 4959978 | Programmable pushbutton combination lock | Mitchell G. Cappell | 1990-10-02 |