Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4491917 | Door control systems | William B. MacKenna, Lawrence G. Sickels, Richard A. Stumpf | 1985-01-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4491917 | Door control systems | William B. MacKenna, Lawrence G. Sickels, Richard A. Stumpf | 1985-01-01 |