Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847577 | Security and alarm system employing a particular pulse width discriminator | Roland T. Gerhart | 1989-07-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847577 | Security and alarm system employing a particular pulse width discriminator | Roland T. Gerhart | 1989-07-11 |