Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5686948 | Method for refilling ink jet cartridges | Richard G. Crystal, Raymond Geffre | 1997-11-11 |
| 5572852 | Method for opening, refilling and sealing a cartridge | Richard G. Crystal | 1996-11-12 |
| 5488400 | Method for refilling ink jet cartridges | Richard G. Crystal, Raymond Geffre | 1996-01-30 |
| 5400573 | Kit and method for opening, refilling and sealing a cartridge | Richard G. Crystal | 1995-03-28 |