Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4454734 | Rigid and compressible dye tubes | Robert Paul Marquis | 1984-06-19 |
| 4331305 | Rigid and compressible dye tubes | Robert Paul Marquis | 1982-05-25 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4454734 | Rigid and compressible dye tubes | Robert Paul Marquis | 1984-06-19 |
| 4331305 | Rigid and compressible dye tubes | Robert Paul Marquis | 1982-05-25 |