G01R 19/18
Arrangements for measuring currents or voltages or for indicating presence or sign
Official title: using conversion of DC into AC, e.g. with choppers
G01R19/18 (Arrangements for measuring currents or voltages or for indicating presence or sign) appears on 122 US grants and 89 published applications in this corpus.
Search patents in G01R- Granted patents
- 122
- Published applications
- 89
- Assignees
- 110
- Inventors
- 250
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 10 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 2 |
| 2003 | 1 | 2 |
| 2004 | 0 | 2 |
| 2005 | 3 | 3 |
| 2006 | 1 | 3 |
| 2007 | 5 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 3 |
| 2010 | 1 | 3 |
| 2011 | 2 | 4 |
| 2012 | 2 | 6 |
| 2013 | 1 | 4 |
| 2014 | 6 | 6 |
| 2015 | 9 | 9 |
| 2016 | 4 | 0 |
| 2017 | 6 | 0 |
| 2018 | 1 | 6 |
| 2019 | 7 | 6 |
| 2020 | 4 | 2 |
| 2021 | 3 | 5 |
| 2022 | 5 | 4 |
| 2023 | 1 | 1 |
| 2024 | 3 | 8 |
| 2025 | 5 | 5 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Current sensing circuitry4 Aug 2026US 12,699,119 B2Cirrus Logic, Inc.
- Calibration for routing resistance induced error9 Jun 2026US 12,650,460 B2Texas Instruments Incorporated
- Test device6 Jan 2026US 12,517,175 B2Ls Electric Co., Ltd.
- Fluxgate current transducer11 Nov 2025US 12,467,957 B2LEM International SA
- Absence of voltage detector16 Sep 2025US 12,416,651 B2Panduit Corp.
- Direct current estimation device, power conversion device, and direct current estimation method2 Jul 2026US 2026/0186031 A1Hitachi Astemo, Ltd.
- Electric current measurement circuit, stage apparatus, and control method of actuator11 Jun 2026US 2026/0160788 A1Sumitomo Heavy Industries, Ltd.
- Fluxgate current sensor7 May 2026US 2026/0126476 A1Honeywell International Inc.
- Absence of voltage detector15 Jan 2026US 2026/0016511 A1Panduit Corp.
- Systems and methods for detecting currents of power management systems2 Oct 2025US 2025/0306064 A1On-Bright Integrations Co., Ltd.
Most cited
By later US patents
- Method and apparatus for sensing direct current of one polarity in a conductor and electronically commutated motor control responsive to sensed motor current77US 4,952,853 AGeneral Electric Company · 1990
- Measuring transformer42US 4,309,655 ALGZ Landis & Gyr Zug AG · 1982
- Detector circuit for current measurements39US 4,616,174 ADanfysik A/S · 1986
- Electricity meter with arrangement for monitoring core saturation incidents30US 4,843,310 ALGZ Landis & Gyr Zug AG · 1989
- High resolution current sensing apparatus30US 6,348,788 B1Rockwell Automation Technologies, Inc. · 2002