Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5248112 | Tape transport control system with a feedforward capstan drive to the reel motors | David R. Rodal | 1993-09-28 |
| 5189355 | Interactive rotary controller system with tactile feedback | David N. Larkins, Thomas L. Helmers | 1993-02-23 |
| 4414658 | Linear tracking arrangement in a photographic disc type information containing system | — | 1983-11-08 |