G01R 31/50
Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage
Official title: Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections (testing of sparking plugs H01T13/58)
G01R31/50 (Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage) appears on 7,908 US grants and 8,150 published applications in this corpus.
Search patents in G01R- Granted patents
- 7,908
- Published applications
- 8,150
- Assignees
- 3,134
- Inventors
- 17,555
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 58 | 0 |
| 1977 | 45 | 0 |
| 1978 | 36 | 0 |
| 1979 | 45 | 0 |
| 1980 | 39 | 0 |
| 1981 | 36 | 0 |
| 1982 | 31 | 0 |
| 1983 | 40 | 0 |
| 1984 | 41 | 0 |
| 1985 | 46 | 0 |
| 1986 | 34 | 0 |
| 1987 | 53 | 0 |
| 1988 | 40 | 0 |
| 1989 | 70 | 0 |
| 1990 | 47 | 0 |
| 1991 | 49 | 0 |
| 1992 | 46 | 0 |
| 1993 | 36 | 0 |
| 1994 | 38 | 0 |
| 1995 | 82 | 0 |
| 1996 | 75 | 0 |
| 1997 | 79 | 0 |
| 1998 | 77 | 0 |
| 1999 | 64 | 0 |
| 2000 | 75 | 0 |
| 2001 | 92 | 26 |
| 2002 | 107 | 69 |
| 2003 | 77 | 85 |
| 2004 | 90 | 108 |
| 2005 | 93 | 111 |
| 2006 | 126 | 99 |
| 2007 | 90 | 100 |
| 2008 | 66 | 136 |
| 2009 | 87 | 169 |
| 2010 | 117 | 181 |
| 2011 | 115 | 208 |
| 2012 | 131 | 250 |
| 2013 | 186 | 312 |
| 2014 | 204 | 339 |
| 2015 | 253 | 446 |
| 2016 | 323 | 467 |
| 2017 | 451 | 398 |
| 2018 | 382 | 400 |
| 2019 | 429 | 466 |
| 2020 | 457 | 554 |
| 2021 | 516 | 549 |
| 2022 | 500 | 533 |
| 2023 | 451 | 542 |
| 2024 | 496 | 557 |
| 2025 | 492 | 572 |
| 2026 | 295 | 473 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01R 31/52Testing for short-circuits, leakage current or ground faults3,353
- G01R 31/66Testing of connections1,607
- G01R 31/58Testing of lines, cables or conductors1,518
- G01R 31/54Testing for continuity1,052
- G01R 31/62Testing of transformers439
- G01R 31/64Testing of capacitors429
- G01R 31/72Testing of electric windings222
- G01R 31/74Testing of fuses151
All 10 subgroupsShow fewer
Recent patents
- Self-test auto monitor ground fault circuit interrupter (GFCI) with power denial6 Oct 2026US 12,754,232 B2Hubbell Incorporated
- Monitoring a transformer comprising a tap changer6 Oct 2026US 12,754,255 B2Hitachi Energy Ltd
- Cable with abnormality sign detection function and wire abnormality sign detection system6 Oct 2026US 12,755,864 B2Autonetworks Technologies, Ltd.
- Safety system reset diagnostic by reset-driver(s)6 Oct 2026US 12,756,390 B2Semiconductor Components Industries, LLC
- Low current leakage measurement on a high current unified static and dynamic characterization platform29 Sep 2026US 12,748,145 B2Keithley Instruments, LLC
- Method and computer program for detecting a short-circuit in a power converter, controller for controlling a power converter, and computer-readable medium8 Oct 2026US 2026/0309803 A1
- Fault Detection Apparatus and Method8 Oct 2026US 2026/0309804 A1Reed Semiconductor Corporation
- Systems and methods for detecting intermittent loose connection in battery energy storage systems8 Oct 2026US 2026/0309805 A1LG Energy Solution, Ltd.
- Connector health monitoring device8 Oct 2026US 2026/0309806 A1TE Connectivity Solutions GmbH
- Trailer connector with integrated power monitoring system and related methods8 Oct 2026US 2026/0309807 A1
Most cited
By later US patents
- Method and apparatus for responding to events affecting communications in a communication network473US 9,769,020 B2AT&T Intellectual Property I, L. P. · 2017
- Method and apparatus that provides fault tolerance in a communication network404US 9,615,269 B2AT&T Intellectual Property I, L. P. · 2017
- Method and apparatus for configuring a communication interface315US 10,009,067 B2AT&T Intellectual Property I, L. P. · 2018
- Real time monitoring of cable patch panel295US 6,784,802 B1Nordx/CDT, Inc. · 2004
- Method and system for continuity testing of medical electrodes286US 7,766,905 B2Covidien LP · 2010