Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870516 | Portable dictating machine | John W. Hoover, Paul Dulaff | 1989-09-26 |
| D293100 | Cassette | John W. Hoover | 1987-12-08 |
| D291882 | Dictating machine | John W. Hoover, Rocco Luppino | 1987-09-15 |
| D290252 | Record/playback device | John J. Dwyer, Sandor. F. Weisz, Terrence M. Doeberl | 1987-06-09 |
| 4547821 | Head support and positioning assembly for record/playback device | John J. Dwyer, John W. Hoover | 1985-10-15 |
| 4443827 | Tape cassette | John W. Hoover, Raymond C. Chapman, Dominick F. Dammassa | 1984-04-17 |