Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5076624 | Door chain device | — | 1991-12-31 |
| 5041810 | Antitheft device for an automobile | — | 1991-08-20 |
| 5029912 | Locking device | — | 1991-07-09 |
| 4993760 | Door chain-locking device | — | 1991-02-19 |
| 4974624 | Gas shut-off device | — | 1990-12-04 |
| 4852374 | Electrical shock-preventable key unit | — | 1989-08-01 |
| 4840050 | Lock device with trigger bolt | — | 1989-06-20 |
| 4787223 | Door lock device for automobile | — | 1988-11-29 |
| 4712103 | Door lock control system | — | 1987-12-08 |
| 4679834 | Door unlocking device | — | 1987-07-14 |
| 4580010 | Building surveillance apparatus | — | 1986-04-01 |
| 4580125 | Signaling device for preventing automobile theft | — | 1986-04-01 |
| 4565090 | Detection device for detecting and indicating operation of a gas meter | — | 1986-01-21 |
| 4399673 | Lock device | — | 1983-08-23 |
| 4376379 | Locking device | — | 1983-03-15 |
| 4205328 | Apparatus for controlling a power source for an electrical alarm or indicator | — | 1980-05-27 |