Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4720128 | Magnetic emergency exit door lock with time delay | Emanuel L. Logan, Jr., Michael A. Kelly | 1988-01-19 |
| 4703962 | Magnetic door lock with time delay option | Michael A. Kelly, Emmanuel L. Logan, Jr. | 1987-11-03 |
| 4652028 | Magnetic emergency exit door lock with time delay | Emanuel L. Logan, Jr., Michael A. Kelly | 1987-03-24 |