Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6934426 | Fiber optic security sensor and system with integrated secure data transmission and power cables | William Evenson | 2005-08-23 |
| 5247270 | Dual leaky cables | R. Keith Harman, Charles R. Hill | 1993-09-21 |
| 4710753 | Security system transmission line | John W. Patchell, R. Keith Harman | 1987-12-01 |