Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5408256 | Refillable color ink jet cartridge and method for making said cartridge | Robert Keen, Donald R. Beck | 1995-04-18 |
| 5329294 | User refillable ink jet cartridge and method for making said cartridge | Susan P. Ontawar | 1994-07-12 |
| 4816877 | Refillable toner cartridge and method of manufacture thereof | — | 1989-03-28 |