Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6328496 | Marking instruments | Alan Robert Hill, Clive Barnes, Charles C. Packham | 2001-12-11 |
| 6039493 | Ball point pen | Clive Barnes | 2000-03-21 |
| 6027274 | Marking instruments | Roy Nicoll | 2000-02-22 |
| 5888007 | Marking instrument | Roy Nicoll | 1999-03-30 |