Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855718 | Fire detection system employing at least one optical waveguide | John M. Cholin | 1989-08-08 |
| 4712096 | Condition responsive detection system and method | John M. Cholin, Ray Voorhis | 1987-12-08 |
| 4553031 | Optical fire or explosion detection system and method | John M. Cholin, Ray Voorhis | 1985-11-12 |
| 4464575 | Test device for an optical infra red detector | John M. Cholin, Ray Voorhis | 1984-08-07 |