G01R 19/0007
Frequency selective voltage or current level measuring
Official title: {Frequency selective voltage or current level measuring (measuring frequency G01R23/00; testing attenuation in line transmission systems H04B3/48; monitoring testing in transmission systems H04B17/00)}
G01R19/0007 (Frequency selective voltage or current level measuring) appears on 134 US grants and 144 published applications in this corpus.
Search patents in G01R- Granted patents
- 134
- Published applications
- 144
- Assignees
- 128
- Inventors
- 349
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 2 |
| 2006 | 2 | 0 |
| 2007 | 0 | 2 |
| 2008 | 1 | 3 |
| 2009 | 2 | 3 |
| 2010 | 1 | 3 |
| 2011 | 4 | 3 |
| 2012 | 3 | 3 |
| 2013 | 2 | 4 |
| 2014 | 2 | 10 |
| 2015 | 6 | 15 |
| 2016 | 11 | 8 |
| 2017 | 12 | 4 |
| 2018 | 2 | 11 |
| 2019 | 9 | 7 |
| 2020 | 11 | 10 |
| 2021 | 7 | 10 |
| 2022 | 9 | 9 |
| 2023 | 9 | 11 |
| 2024 | 10 | 5 |
| 2025 | 4 | 11 |
| 2026 | 3 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Shunt-based current sensor28 Jul 2026US 12,693,315 B2Denso Corporation
- Wireless circuitry with low-noise peak detection7 Jul 2026US 12,674,825 B2Apple Inc.
- Systems, devices, and methods for measuring direct current/low frequency signal components31 Mar 2026US 12,590,996 B2Tektronix, Inc.
- Current sensor system21 Oct 2025US 12,449,446 B2Melexis Technologies SA
- Testing method for carrier mobility of insulating polymers5 Aug 2025US 12,379,338 B1Shanghai Jiao Tong University
- Enhanced motor identification and control based on current characteristic response8 Oct 2026US 2026/0309781 A1Tesla, Inc.
- Weighted lock-in detector20 Aug 2026US 2026/0243808 A1
- Normalization circuit and related electronic system20 Aug 2026US 2026/0246436 A1STMicroelectronics International N. V.
- Intermittent Ground Fault Detection For Stators in High-Impedance Grounded Generators13 Aug 2026US 2026/0235678 A1WiSys Technology Foundation, Inc.
- Current measurement device and method30 Jul 2026US 2026/0219301 A1Southern Power Grid Sensing Technology (Guangdong) Co., Ltd.
Most cited
By later US patents
- Microprocessor controlled digital detector112US 4,258,423 AThe United States of America as represented by the Secretary of the Army · 1981
- Systems and methods for determining radio frequency interference52US 4,119,964 A1978
- RF circuit for use in a combined leakage detector and signal level monitor36US 5,982,165 AWavetek Corporation · 1999
- Process and circuit to determine estimates of the instantaneous value of parameters of at least one sinusoidal signal with constant and known frequency which is an additive component of a measuring signal29US 5,249,150 ALandis & Gyr Betriebs AG · 1993
- Methods and apparatus to detect a blank frame in a digital video broadcast signal26US 7,984,462 B2The Nielsen Company (US), LLC · 2011