G01R 19/16571
Comparing ac or dc current with one threshold
Official title: {comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current (G01R19/16514, G01R19/16519, G01R19/16528, G01R19/16533, G01R19/1659 take precedence; measuring currents by using elements sensitive to the magnetic field generated G01R15/14; measuring earth resistance G01R27/18; testing for leakage or short circuits in electrical apparatus G01R31/52)}
G01R19/16571 (Comparing ac or dc current with one threshold) appears on 397 US grants and 404 published applications in this corpus.
Search patents in G01R- Granted patents
- 397
- Published applications
- 404
- Assignees
- 328
- Inventors
- 1,011
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 6 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 4 |
| 2003 | 1 | 2 |
| 2004 | 6 | 3 |
| 2005 | 5 | 8 |
| 2006 | 6 | 5 |
| 2007 | 4 | 4 |
| 2008 | 4 | 1 |
| 2009 | 4 | 4 |
| 2010 | 1 | 5 |
| 2011 | 0 | 6 |
| 2012 | 6 | 4 |
| 2013 | 3 | 8 |
| 2014 | 5 | 2 |
| 2015 | 5 | 6 |
| 2016 | 7 | 9 |
| 2017 | 8 | 14 |
| 2018 | 6 | 18 |
| 2019 | 14 | 29 |
| 2020 | 25 | 34 |
| 2021 | 25 | 36 |
| 2022 | 27 | 44 |
| 2023 | 41 | 56 |
| 2024 | 46 | 30 |
| 2025 | 37 | 37 |
| 2026 | 23 | 35 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Current measuring apparatus159US 4,630,218 ACooper Industries, Inc. · 1986
- Fault indicator having remote light indication of fault detection76US 6,133,723 AE. O. Schweitzer Manufacturing Co., Inc. · 2000
- Current sensing device and monitor73US 4,558,310 A1985
- Switching circuit54US 9,525,412 B2Reno Technologies, Inc. · 2016
- Current rating verification system48US 4,316,187 A1982