Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4786196 | Pencil with a tapered follower | — | 1988-11-22 |
| 4752146 | Coloring crayons | — | 1988-06-21 |
| 4547090 | Writing instrument with nib operated valve | Hugh W. B. Baker, Ivor J. M. Fehr | 1985-10-15 |
| 4221493 | Pen nibs | William L. Cole, Humphrey G. Bowden | 1980-09-09 |
| 4208189 | Match splints and matches made therewith | Robert Lyall, Ian Maxwell | 1980-06-17 |
| 4205958 | Method for the manufacture of matches | Robert Lyall, Ian Maxwell | 1980-06-03 |