G01R 31/72
Testing of electric windings
Official title: Testing of electric windings (testing of transformers G01R31/62)
G01R31/72 (Testing of electric windings) appears on 222 US grants and 197 published applications in this corpus.
Search patents in G01R- Granted patents
- 222
- Published applications
- 197
- Assignees
- 197
- Inventors
- 664
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 0 |
| 2002 | 2 | 5 |
| 2003 | 3 | 0 |
| 2004 | 2 | 1 |
| 2005 | 2 | 2 |
| 2006 | 3 | 2 |
| 2007 | 1 | 2 |
| 2008 | 2 | 4 |
| 2009 | 4 | 6 |
| 2010 | 3 | 4 |
| 2011 | 3 | 2 |
| 2012 | 1 | 5 |
| 2013 | 4 | 11 |
| 2014 | 4 | 7 |
| 2015 | 5 | 12 |
| 2016 | 10 | 5 |
| 2017 | 11 | 12 |
| 2018 | 4 | 9 |
| 2019 | 14 | 11 |
| 2020 | 9 | 22 |
| 2021 | 14 | 21 |
| 2022 | 18 | 20 |
| 2023 | 12 | 8 |
| 2024 | 14 | 9 |
| 2025 | 12 | 7 |
| 2026 | 3 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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- Method for manufacturing inductors and transformers with continuous winding2 Jul 2026US 2026/0188572 A1Krah IndúStria E ComéRcio De Componentes EletrôNicos Ltda
Most cited
By later US patents
- System and method for servo control of nonlinear electromagnetic actuators139US 6,208,497 B1Venture Scientifics, LLC · 2001
- Method and apparatus for monitoring armature position in direct-current solenoids79US 5,583,434 AMartin Marietta Energy Systems, Inc. · 1996
- Solenoid closure detection63US 5,053,911 AMotorola, Inc. · 1991
- Method of operating a fuel injector51US 5,986,871 ACaterpillar Inc. · 1999
- Solenoid driver and method for determining solenoid operational status46US 5,784,245 AMotorola, Inc. · 1998