Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7909705 | Variable mass grip | David Keith Gill, Donald Lawrence Murdock, Bruce John Norton | 2011-03-22 |
| 7399235 | Variable mass grip | David Keith Gill, Donald Lawrence Murdock, Bruce John Norton | 2008-07-15 |