Johansson; Fritz H.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Johansson; Fritz H..The latest application filed is for "hafe-duplex two-wire dc power-line communication system".
- Johansson; Fritz H. - Mesa AZ
- Johansson; Fritz H. - San Jose CA
| Patent | Date |
|---|---|
| Hafe-duplex two-wire DC power-line communication system Grant 5,986,539 - Johansson , et al. November 16, 1 | 1999-11-16 |
| Apparatus and method for device control using a two conductor power line Grant 4,788,527 - Johansson November 29, 1 | 1988-11-29 |
| Electronic digital combination lock Grant 4,770,012 - Johansson , et al. * September 13, 1 | 1988-09-13 |
| Electronic digital combination lock Grant 4,457,148 - Johansson , et al. July 3, 1 | 1984-07-03 |
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