Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D492478 | Tool holder | David Charles Shepherd, Martin Darbyshire, Michael L. Woods | 2004-07-06 |
| D491622 | Scabbard with removable knife | David Charles Shepherd, Martin Darbyshire, Michael L. Woods | 2004-06-15 |
| 5231949 | Dihedral tunnel boat hull | — | 1993-08-03 |