Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5117893 | Rolling shutter system | Tor Petterson, Stephen Bartok | 1992-06-02 |
| 5056678 | Access port sealing device | Laurence M. Grills, Charles Saxton, Jr., Reuven Stein | 1991-10-15 |
| 5050911 | Breakaway coupling | — | 1991-09-24 |
| D300249 | Rolling shutter valance | David W. Schlundt | 1989-03-14 |
| 4690193 | Rolling shutter construction | Stephen Bartok | 1987-09-01 |