Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D305422 | Three keypad pushbutton set for telecommunications instruments | David J. Steer, Leonard Colebourne | 1990-01-09 |
| D299718 | Keypad for telecommunications instruments | David J. Steer, Leonard Colebourne | 1989-02-07 |