Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6518574 | Fire detector with multiple sensors | — | 2003-02-11 |
| 6515283 | Fire detector with modulation index measurement | Owen D. Parham, Theodore R. Lapp | 2003-02-04 |
| 6507023 | Fire detector with electronic frequency analysis | Owen D. Parham | 2003-01-14 |