Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6518329 | Liquid ink | Nan J. Lin, Roy Nicoll, Charles C. Packham, Vliet Hulse, John A. Thompson | 2003-02-11 |
| 6075070 | Marking instrument including liquid ink | Nan J. Lin, Roy Nicoll, Charles C. Packham, Vliet Hulse, John A. Thompson | 2000-06-13 |