Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5533206 | Welding helmet with removable electronic quick change cartridge | Michael J. Petrie | 1996-07-09 |
| 5532767 | Pantoscopic and length adjustable safety spectacle | William E. Roe | 1996-07-02 |