Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5577010 | Apparatus for retrieving and playing a plurality of discs | — | 1996-11-19 |
| 5162712 | Opto-electric central system for a reversible electric motor | Donald C. Rockola | 1992-11-10 |
| 5077923 | Program display for coin operated compact disc phonograph | Donald C. Rockola | 1992-01-07 |
| D322286 | Compact disc album cover display | Donald C. Rockola | 1991-12-10 |
| 5031164 | Compact disc holding mechanism for automatic coin operated phonogram | Donald C. Rockola | 1991-07-09 |
| 4923090 | Delivery assembly for coin-operated can vending machines | Donald C. Rockola | 1990-05-08 |