Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6518329 | Liquid ink | Andrew R. Klassman, Roy Nicoll, Charles C. Packham, Vliet Hulse, John A. Thompson | 2003-02-11 |
| 6075070 | Marking instrument including liquid ink | Andrew R. Klassman, Roy Nicoll, Charles C. Packham, Vliet Hulse, John A. Thompson | 2000-06-13 |
| 5926901 | Foam grip | Mingchih M. Tseng, Michael J. Kwiecien | 1999-07-27 |
| 5876134 | Foam grip | Mingchih M. Tseng, Michael J. Kwiecien | 1999-03-02 |
| 5217255 | Erasable system including marking surface and erasable ink composition | Peter G. Hanley | 1993-06-08 |
| 4988123 | Erasable system including marking surface and erasable ink composition | Peter G. Hanley | 1991-01-29 |
| 4940628 | Erasable system including marking surface and erasable ink composition | Peter G. Hanley | 1990-07-10 |
| 4932800 | Finger gripping device | Richard J. Petrillo, John A. Thompson | 1990-06-12 |
| 4369236 | Battery separator | Dennis D. O'Rell, Wai Ming Choi | 1983-01-18 |
| 4368243 | Battery separator | Dennis D. O'Rell | 1983-01-11 |
| 4228225 | Battery separator | Dennis D. O'Rell | 1980-10-14 |