Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807255 | Alarm system responsive to intrusion induced phase unbalance | — | 1989-02-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807255 | Alarm system responsive to intrusion induced phase unbalance | — | 1989-02-21 |