Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849955 | Moving device for an optical recording system in a high density spiral track-forming apparatus | — | 1989-07-18 |
| 4825432 | Frictionless moving device for an optical recording system in a high density spiral track-forming apparatus capable of resisting disturbing forces | — | 1989-04-25 |