Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D337943 | Safety closure | Mark A. Sirgo, Robert M. Wygant, Paul V. Engelmann | 1993-08-03 |
| 5158194 | Safety closure with easy-open feature for handicapped and elderly individuals | Mark A. Sirgo, Robert M. Wygant, Paul V. Engelmann | 1992-10-27 |