G01R 31/25
Testing of vacuum tubes
G01R31/25 (Testing of vacuum tubes) appears on 48 US grants and 13 published applications in this corpus.
Search patents in G01R- Granted patents
- 48
- Published applications
- 13
- Assignees
- 37
- Inventors
- 96
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 2 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 2 |
| 2016 | 1 | 1 |
| 2017 | 2 | 1 |
| 2018 | 2 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Measurement of a photocathode current29 Sep 2026US 12,748,143 B2Applied Materials Israel Ltd.
- Evaluating performance of X-ray tube18 Feb 2025US 12,228,602 B2Siemens Healthineers AG
- Electrical component monitoring circuit1 Jun 2021US 11,022,641 B1Vulcan Inc.
- Methods and systems for predicting failures in X-ray tubes25 Aug 2020US 10,753,969 B2General Electric Company
- Robust fault diagnosis for electronic devices21 May 2019US 10,295,561 B2International Business Machines Corporation
- Measurement of a photocathode current30 Apr 2026US 2026/0118403 A1Applied Materials Israel Ltd.
- Testing station, testing modules and testing method for testing operation of a plurality of image intensifier tubes5 Feb 2026US 2026/0036615 A1General Starlight Co., Inc.
- Evaluating Performance of X-Ray Tube16 Mar 2023US 2023/0079022 A1Siemens Healthcare GmbH
- Methods and systems for predicting failures in x-ray tubes17 Oct 2019US 2019/0317144 A1General Electric Company
- Device for monitoring the vacuum quality of a vacuum circuit breaker3 Aug 2017US 2017/0221659 A1Schneider Electric Industries SAS
Most cited
By later US patents
- Method and apparatus for testing line screen CRT registration20US 4,439,735 AZenith Radio Corporation · 1984
- Method of convergence measurement for a color picture tube and an apparatus therefor17US 4,593,309 ATokyo Shibaura Denki Kabushiki Kaisha · 1986
- Picture quality testing method and apparatus for color cathode-ray tube16US 4,963,828 AHitachi, Ltd. · 1990
- Apparatus for and method of testing direct-view image intensifiers12US 4,145,142 AThe United States of America as represented by the Secretary of the Army · 1979
- Method and apparatus for detecting magnetron power supply failure10US 4,868,509 AFusion Systems Corporation · 1989