Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4398226 | Quadruplex recordings with ferrite heads resembling quadruplex recordings with metal heads | Roy H. Seim | 1983-08-09 |
| 4372036 | Method of manufacturing a single-track video ferrite record/reproduce head | — | 1983-02-08 |