G01R 19/0015
Separating ac and dc
Official title: {separating AC and DC}
G01R19/0015 (Separating ac and dc) appears on 43 US grants and 43 published applications in this corpus.
Search patents in G01R- Granted patents
- 43
- Published applications
- 43
- Assignees
- 39
- Inventors
- 87
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 3 |
| 2009 | 2 | 1 |
| 2010 | 1 | 1 |
| 2011 | 2 | 3 |
| 2012 | 1 | 0 |
| 2013 | 1 | 1 |
| 2014 | 1 | 3 |
| 2015 | 0 | 2 |
| 2016 | 1 | 2 |
| 2017 | 2 | 1 |
| 2018 | 0 | 4 |
| 2019 | 6 | 4 |
| 2020 | 3 | 2 |
| 2021 | 1 | 3 |
| 2022 | 4 | 6 |
| 2023 | 3 | 3 |
| 2024 | 6 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems, devices, and methods for measuring direct current/low frequency signal components31 Mar 2026US 12,590,996 B2Tektronix, Inc.
- High accuracy non-invasive current sensor system18 Mar 2025US 12,253,545 B2Purdue Research Foundation
- Detection of a direct current component in an inductive device23 Jul 2024US 12,044,710 B2Siemens Energy Global GmbH & Co. KG
- Method for determining asymmetric vibrations in an electric device25 Jun 2024US 12,019,102 B2Siemens Energy Global GmbH & Co. KG
- Circuit for alternating current and direct current leakage detection7 May 2024US 11,977,130 B2Qingdao Topscomm Communication Co., Ltd
- Normalization circuit and related electronic system20 Aug 2026US 2026/0246436 A1STMicroelectronics International N. V.
- Direct-current current measurement11 Dec 2025US 2025/0377382 A1
- Circuit for alternating current and direct current leakage detection14 Mar 2024US 2024/0085495 A1Qingdao Topscomm Communication Co., Ltd
- Systems, devices, and methods for measuring direct current/low frequency signal components24 Aug 2023US 2023/0266369 A1Tektronix, Inc.
- Processing sinewave signals of variable frequency in a device with fixed processing rates22 Jun 2023US 2023/0194584 A1Schweitzer Engineering Laboratories, Inc.
Most cited
By later US patents
- Methods and apparatus to detect a blank frame in a digital video broadcast signal26US 7,984,462 B2The Nielsen Company (US), LLC · 2011
- Method and apparatus for separating and analyzing composite AC/DC waveforms19US 5,872,457 AADB-Alnaco, Inc. · 1999
- Method and apparatus for DC integrated current sensor19US 7,615,989 B2Honeywell International Inc. · 2009
- Method and apparatus for AC integrated current sensor17US 7,622,910 B2Honeywell International Inc. · 2009
- Tracking filter for sensing DC content in an AC waveform14US 4,556,842 AWestinghouse Electric Corp. · 1985