G01R 31/346
Testing of armature or field windings
Official title: {Testing of armature or field windings}
G01R31/346 (Testing of armature or field windings) appears on 333 US grants and 295 published applications in this corpus.
Search patents in G01R- Granted patents
- 333
- Published applications
- 295
- Assignees
- 201
- Inventors
- 833
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 6 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 12 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 3 |
| 2002 | 6 | 3 |
| 2003 | 3 | 2 |
| 2004 | 6 | 3 |
| 2005 | 2 | 9 |
| 2006 | 6 | 4 |
| 2007 | 5 | 4 |
| 2008 | 2 | 3 |
| 2009 | 1 | 7 |
| 2010 | 3 | 11 |
| 2011 | 6 | 6 |
| 2012 | 8 | 9 |
| 2013 | 6 | 9 |
| 2014 | 8 | 10 |
| 2015 | 8 | 10 |
| 2016 | 10 | 11 |
| 2017 | 9 | 15 |
| 2018 | 15 | 21 |
| 2019 | 23 | 26 |
| 2020 | 22 | 24 |
| 2021 | 18 | 14 |
| 2022 | 19 | 24 |
| 2023 | 15 | 16 |
| 2024 | 19 | 23 |
| 2025 | 16 | 16 |
| 2026 | 11 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
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- Method and apparatus for detection, classification and reduction of internal electrical faults in alternating current propulsion machinery using synchronous detection scheme80US 6,064,172 APower Superconductor Applications Co. · 2000
- Diagnostic device and diagnostic method for rotary machine72US 10,962,449 B2Hitachi, Ltd. · 2021