Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4341952 | Variable pitch grooved label for video disc | Gunter John, David P. Bortfeld | 1982-07-27 |
| 4327283 | Workpiece with machine-readable marking recessed therein and method of making same | Robert L. Quinn | 1982-04-27 |