Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4341952 | Variable pitch grooved label for video disc | Philip M. Heyman, David P. Bortfeld | 1982-07-27 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4341952 | Variable pitch grooved label for video disc | Philip M. Heyman, David P. Bortfeld | 1982-07-27 |