Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5002622 | Glass based optical disc manufacturing process | David P. Gregg | 1991-03-26 |
| 4342714 | Process for making video discs | David P. Gregg | 1982-08-03 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5002622 | Glass based optical disc manufacturing process | David P. Gregg | 1991-03-26 |
| 4342714 | Process for making video discs | David P. Gregg | 1982-08-03 |