Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5281809 | Method of operating light curtain with deactivated zone control | James A. Ashford, Richard E. Klass | 1994-01-25 |
| 5198661 | Segmented light curtain system and method | James A. Ashford, Richard E. Klass | 1993-03-30 |