G01R 21/01
In circuits having distributed constants
Official title: in circuits having distributed constants (G01R21/04, G01R21/07, G01R21/09, G01R21/12 take precedence)
G01R21/01 (In circuits having distributed constants) appears on 133 US grants and 125 published applications in this corpus.
Search patents in G01R- Granted patents
- 133
- Published applications
- 125
- Assignees
- 93
- Inventors
- 260
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 4 |
| 2005 | 3 | 2 |
| 2006 | 2 | 2 |
| 2007 | 3 | 6 |
| 2008 | 4 | 5 |
| 2009 | 0 | 11 |
| 2010 | 9 | 10 |
| 2011 | 6 | 9 |
| 2012 | 9 | 4 |
| 2013 | 10 | 6 |
| 2014 | 5 | 3 |
| 2015 | 4 | 6 |
| 2016 | 3 | 2 |
| 2017 | 4 | 1 |
| 2018 | 2 | 7 |
| 2019 | 3 | 5 |
| 2020 | 5 | 9 |
| 2021 | 7 | 5 |
| 2022 | 9 | 5 |
| 2023 | 8 | 6 |
| 2024 | 5 | 7 |
| 2025 | 5 | 6 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Power detection in radio frequency systems25 Aug 2026US 12,716,926 B2Skyworks Solutions, Inc.
- Power detector16 Jun 2026US 12,656,378 B2STMicroelectronics International N. V.
- Transceiver interface with power detection9 Jun 2026US 12,652,008 B2QUALCOMM Incorporated
- Power measurement circuit, chip and communication terminal10 Mar 2026US 12,571,827 B2Shanghai Vanchip Technologies Co., Ltd.
- Channel-selective RF power sensor3 Feb 2026US 12,542,615 B2Bird Technologies Group Inc.
- Radio frequency power detection device and system21 May 2026US 2026/0140153 A1Shenzhen Rspower Technology Co., Ltd.
- Low-power integrated radio frequency power detector21 May 2026US 2026/0142633 A1ViaSat, Inc.
- Radio-frequency Power Detector with Transimpedance Amplifier and Input Offset Mitigation18 Sep 2025US 2025/0290959 A1Apple Inc.
- Method and apparatus for emulating a reactive source impedance of a generator18 Sep 2025US 2025/0293000 A1Advanced Energy Industries, Inc.
- Multipath cross correlation radiometry4 Sep 2025US 2025/0277836 A1The Regents of the University of Colorado, a body corporate
Most cited
By later US patents
- Arc detection56US 8,334,700 B2MKS Instruments, Inc. · 2012
- Application of wideband sampling for arc detection with a probabilistic model for quantitatively measuring arc events54US 8,289,029 B2MKS Instruments, Inc. · 2012
- Method to calculate energy efficiency of information technology equipment53US 7,970,561 B2Power Assure, Inc. · 2011
- Method for calculating energy efficiency of information technology equipment52US 8,571,820 B2Power Assure, Inc. · 2013
- Microwave oven leakage detector and method of using same to test door seal leakage51US 4,354,153 ALitton Systems, Inc. · 1982