Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5139293 | Armature assembly for electromagnetic door holder | Michael Zimmerman | 1992-08-18 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5139293 | Armature assembly for electromagnetic door holder | Michael Zimmerman | 1992-08-18 |