Keen; Fred
Patent Applications and Registrations
Patent applications and USPTO patent grants for Keen; Fred.The latest application filed is for "refillable color ink jet cartridge and method for making said cartridge".
- Keen; Fred - Tenafly NJ
| Patent | Date |
|---|---|
| Refillable color ink jet cartridge and method for making said cartridge Grant 5,408,256 - Keen , et al. April 18, 1 | 1995-04-18 |
| User refillable ink jet cartridge and method for making said cartridge Grant 5,329,294 - Ontawar , et al. July 12, 1 | 1994-07-12 |
| Refillable toner cartridge and method of manufacture thereof Grant 4,816,877 - Keen March 28, 1 | 1989-03-28 |
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