Harman; R. Keith
Patent Applications and Registrations
Patent applications and USPTO patent grants for Harman; R. Keith.The latest application filed is for "alternating current detector".
- Harman; R. Keith - Kanata CA
- Harman; R. Keith - Tempe AZ
| Patent | Date |
|---|---|
| Alternating current detector Grant 5,594,332 - Harman , et al. January 14, 1 | 1997-01-14 |
| Differential, multiple cell reflex cable intrusion detection system and method Grant 5,446,446 - Harman August 29, 1 | 1995-08-29 |
| Phase shift divided leaky cable sensor Grant 4,994,789 - Harman February 19, 1 | 1991-02-19 |
| Security system transmission line Grant 4,710,753 - Rich , et al. December 1, 1 | 1987-12-01 |
| Shunt transmission line for use in leaky coaxial cable system Grant 4,605,914 - Harman August 12, 1 | 1986-08-12 |
| Intrusion detector Grant 4,562,428 - Harman , et al. December 31, 1 | 1985-12-31 |
| Perimeter surveillance system Grant 4,249,207 - Harman , et al. February 3, 1 | 1981-02-03 |
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