| 8284904 |
Method for performing a shield integrity test and for isolating trouble in the shield using graphical analysis |
— |
2012-10-09 |
| 8232807 |
Apparatus for detecting imbalances in a paired line |
Thomas W. Durston |
2012-07-31 |
| 7719288 |
Apparatus for detecting imbalances in a paired line |
— |
2010-05-18 |
| 7710122 |
Ground resistance test apparatus |
— |
2010-05-04 |
| 6559651 |
Method for locating an open in a conductive line of an insulated conductor |
— |
2003-05-06 |
| 5995588 |
Tone location device for locating faults in a paired line |
— |
1999-11-30 |
| D352912 |
Telecommunications line noise measurement device |
— |
1994-11-29 |
| 5302905 |
Apparatus and method for detecting and isolating noise-creating imbalances in a paired telecommunications line |
— |
1994-04-12 |
| 5157336 |
Noise measurement in a paired telecommunications line |
— |
1992-10-20 |
| 4384214 |
Non-interrupting power supplies for loads of less than 500 watts |
Michael J. Dewey, Larry P. Jamison |
1983-05-17 |
| 4291204 |
Fault locating system for electric cables and the like |
— |
1981-09-22 |