Issued Patents All Time
Showing 51–52 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5391012 | Mechanical-electrical safety locking system | William M. Blenkush, Harry R. Brown, Michael A. Knipfer | 1995-02-21 |
| 5356233 | Mechanical-electrical safety locking system | William M. Blenkush, Harry R. Brown, Michael A. Knipfer | 1994-10-18 |