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Your search returned 90 patents.
( 379/27.06 in Current US Classification ) |
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| Patent ID | Title | Date Filed |
| 4536617 | Remotely-activated switching apparatus
| August 1, 1983 |
| 4525605 | System for accessing electrical circuits and relay switch thereof
| December 8, 1982 |
| 4516070 | Magnetic current sensor with offset and load correction
| July 16, 1982 |
| 4443669 | Subscriber connection circuit
| August 13, 1981 |
| 4438299 | On-line telephone troubleshooting apparatus
| February 26, 1982 |
| 4434328 | Remotely actuated telephone instrument connection block having instrument lockout feature
| June 21, 1982 |
| 4424421 | Apparatus for testing subscriber carrier systems
| October 23, 1981 |
| 4323799 | Impulse activated time delay self-restoring switch
| August 9, 1979 |
| 4168402 | Electronic trunk selector
| January 5, 1978 |
| 4126771 | Telephone line lifting apparatus
| July 27, 1977 |
| 4079210 | Ringing and testing control circuitry for communication systems
| May 11, 1977 |
| 4054759 | Subscriber loop verification device and method
| November 15, 1976 |
| 1 |
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