Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D648994 | Shovel head | David Randolph, James M. Wagner, Martin R. Ehrenzeller, Jr., David L. Gallaway | 2011-11-22 |
| D634996 | Shovel blade | David Randolph, James M. Wagner, Martin R. Ehrenzeller, Jr., David L. Gallaway | 2011-03-29 |