Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D319838 | Ribbon cartridge for lettering system | Michael P. Kassner | 1991-09-10 |
| 4309913 | Serial release mechanism and drainage monitor embodying the same | Robert C. Wingrove | 1982-01-12 |
| 4181121 | Serial release mechanism and drainage monitor embodying the same | Robert C. Wingrove | 1980-01-01 |