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Class Information
Number: 324/525
Name: Electricity: measuring and testing > Fault detecting in electric circuits and of electric components > For fault location > By resistance or impedance measuring
Description: Subject matter where measured resistance or impedance value indicate the location of a fault.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7592817 |
Alignment correction system and method of use |
Sep. 22, 2009 |
| 7560935 |
Ground-fault resistance measurement circuit and ground-fault detection circuit |
Jul. 14, 2009 |
| 7550981 |
Circuit and method for determining potentiometer wiper resistance |
Jun. 23, 2009 |
| 7536663 |
Method and apparatus for quantifying the timing error induced by an impedance variation of a signal path |
May. 19, 2009 |
| 7495450 |
Device and method for detecting anomolies in a wire and related sensing methods |
Feb. 24, 2009 |
| 7472026 |
Multi-ended fault location system |
Dec. 30, 2008 |
| 7459914 |
Systems and methods for electrical leakage detection |
Dec. 2, 2008 |
| 7443308 |
Enhanced AC immunity in ground fault detection |
Oct. 28, 2008 |
| 7429867 |
Circuit for and method of detecting a defect in a component formed in a substrate of an integrated circuit |
Sep. 30, 2008 |
| 7423433 |
Method and system for multi-frequency inductive ratio measurement |
Sep. 9, 2008 |
| 7405578 |
Device for monitoring the contact integrity of a joint |
Jul. 29, 2008 |
| 7391219 |
Chip type electronic component for test, and mounted state test method |
Jun. 24, 2008 |
| 7372369 |
Monitoring of alarm system wiring |
May. 13, 2008 |
| 7365546 |
Apparatus and method for non-destructive testing of primers, in particular for airbags in motor vehicles |
Apr. 29, 2008 |
| 7345488 |
Apparatus and method for determining a faulted phase of a three-phase ungrounded power system |
Mar. 18, 2008 |
| 7323880 |
Ground circuit impedance measurement |
Jan. 29, 2008 |
| 7312608 |
Systems and methods for inspecting electrical conductivity in composite materials |
Dec. 25, 2007 |
| 7308754 |
Methods for trimming electrical parameters in an electrical circuit |
Dec. 18, 2007 |
| 7304485 |
Analysis of the quality of contacts and vias in multi-metal fabrication processes of semiconductor devices, method and test chip architecture |
Dec. 4, 2007 |
| 7298149 |
Fault location using measurements of current and voltage from one end of a line |
Nov. 20, 2007 |
| 7295017 |
Method and system for calculating railroad track ballast resistance |
Nov. 13, 2007 |
| 7286963 |
Method and device for fault location on three terminal power line |
Oct. 23, 2007 |
| 7284472 |
Hydraulic cylinder |
Oct. 23, 2007 |
| 7265555 |
Loop impedance meter |
Sep. 4, 2007 |
| 7263759 |
Methods of manufacturing and testing bonding wires |
Sep. 4, 2007 |
| 7263174 |
Predicting performance of telephone lines for data services |
Aug. 28, 2007 |
| 7262603 |
System and method for sensing the formation of tin whiskers |
Aug. 28, 2007 |
| 7259572 |
Method and apparatus for detecting impedance |
Aug. 21, 2007 |
| 7233153 |
Method and system for determining location of phase-to-earth fault |
Jun. 19, 2007 |
| 7221166 |
Fault location using measurements from two ends of a line |
May. 22, 2007 |
| 7191078 |
Offset compensated position sensor and method |
Mar. 13, 2007 |
| 7180302 |
Method and system for determining cracks and broken components in armor |
Feb. 20, 2007 |
| 7161354 |
Leakage current or resistance measurement method, and monitoring apparatus and monitoring system of the same |
Jan. 9, 2007 |
| 7145346 |
On-chip resistance monitor and diagnoses for electrical fuses |
Dec. 5, 2006 |
| 7145344 |
Method and circuits for localizing defective interconnect resources in programmable logic devices |
Dec. 5, 2006 |
| 7129710 |
Printed circuit card |
Oct. 31, 2006 |
| 7111983 |
Temperature detection method and apparatus for inverter-driven machines |
Sep. 26, 2006 |
| 7102360 |
Procedure to measure grounding resistances of electrical installations by measuring the loop impedance |
Sep. 5, 2006 |
| 7102357 |
Determination of worst case voltage in a power supply loop |
Sep. 5, 2006 |
| 7100504 |
Short-circuit detection probe |
Sep. 5, 2006 |
| 7095239 |
Method for detecting defects that exhibit repetitive patterns |
Aug. 22, 2006 |
| 7081756 |
Substrate inspection apparatus, substrate inspection method, method of manufacturing semiconductor device and recording medium |
Jul. 25, 2006 |
| 7081193 |
Multi-stack isolation detection system |
Jul. 25, 2006 |
| 7076374 |
Methods and systems for detecting and locating damage in a wire |
Jul. 11, 2006 |
| 7071699 |
Non-load driven fault monitor for electrical circuits |
Jul. 4, 2006 |
| 7068041 |
Method and system for multi-frequency inductive ratio measurement |
Jun. 27, 2006 |
| 7068042 |
Method and apparatus for monitoring integrity of wires or electrical cables |
Jun. 27, 2006 |
| 7069116 |
High impedance fault detection |
Jun. 27, 2006 |
| 7068040 |
Ground circuit impedance measurement apparatus and method |
Jun. 27, 2006 |
| 7046013 |
Open-circuit failure detection circuit |
May. 16, 2006 |
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