Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D256023 | Stage for transparency projection | Paul Constantine, Harry S. Rubin | 1980-07-22 |
| 4203659 | Transparency storage and display apparatus | Paul Constantine, Harry S. Rubin | 1980-05-20 |