G01R 23/02
Arrangements for measuring frequency
Official title: Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
G01R23/02 (Arrangements for measuring frequency) appears on 1,069 US grants and 754 published applications in this corpus.
Search patents in G01R- Granted patents
- 1,069
- Published applications
- 754
- Assignees
- 641
- Inventors
- 2,108
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 27 | 0 |
| 1978 | 30 | 0 |
| 1979 | 19 | 0 |
| 1980 | 13 | 0 |
| 1981 | 10 | 0 |
| 1982 | 30 | 0 |
| 1983 | 18 | 0 |
| 1984 | 20 | 0 |
| 1985 | 14 | 0 |
| 1986 | 16 | 0 |
| 1987 | 24 | 0 |
| 1988 | 17 | 0 |
| 1989 | 17 | 0 |
| 1990 | 17 | 0 |
| 1991 | 18 | 0 |
| 1992 | 14 | 0 |
| 1993 | 7 | 0 |
| 1994 | 13 | 0 |
| 1995 | 14 | 0 |
| 1996 | 10 | 0 |
| 1997 | 12 | 0 |
| 1998 | 13 | 0 |
| 1999 | 10 | 0 |
| 2000 | 8 | 0 |
| 2001 | 10 | 4 |
| 2002 | 14 | 8 |
| 2003 | 14 | 11 |
| 2004 | 4 | 11 |
| 2005 | 7 | 3 |
| 2006 | 10 | 8 |
| 2007 | 6 | 10 |
| 2008 | 6 | 11 |
| 2009 | 5 | 18 |
| 2010 | 15 | 29 |
| 2011 | 12 | 14 |
| 2012 | 19 | 30 |
| 2013 | 27 | 39 |
| 2014 | 28 | 47 |
| 2015 | 35 | 71 |
| 2016 | 49 | 42 |
| 2017 | 45 | 42 |
| 2018 | 41 | 53 |
| 2019 | 46 | 43 |
| 2020 | 54 | 41 |
| 2021 | 41 | 41 |
| 2022 | 32 | 48 |
| 2023 | 38 | 40 |
| 2024 | 38 | 37 |
| 2025 | 37 | 34 |
| 2026 | 23 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01R 23/15Indicating that frequency of pulses is either above or below a predetermined225
- G01R 23/10By converting frequency into a train of pulses, which are then counted184
- G01R 23/06By converting frequency into an amplitude of current or voltage118
- G01R 23/14By heterodyning91
- G01R 23/04Adapted for measuring in circuits having distributed constants46
- G01R 23/12By converting frequency into phase shift42
Recent patents
- Wireless power transmission system for detecting optimal resonance frequency and method of detecting optimal resonance frequency using the same15 Sep 2026US 12,738,767 B2Banf Co., Ltd.
- Methods and devices of 425NM wavelength reference construction based on fluorescence-induced effect14 Jul 2026US 12,680,871 B2National Institute of Metrology, China
- Sensor module14 Jul 2026US 12,681,063 B2Seiko Epson Corporation
- Measurement application device30 Jun 2026US 12,669,526 B2Rohde & Schwarz GmbH & Co.KG
- Integrated sensor and method of timing monitoring in an integrated sensor30 Jun 2026US 12,669,531 B2STMicroelectronics S,r.l.
- State diagnosis device, state diagnosis method, and abnormality sign inference device of electric motor8 Oct 2026US 2026/0309782 A1Mitsubishi Electric Corporation
- Semiconductor aging monitoring1 Oct 2026US 2026/0299014 A1Intel Corporation
- Electrical parameter measuring device24 Sep 2026US 2026/0287618 A1Solfacil Energia Solar Tecnologia E Servicos Financeiros Ltda
- Active power metering device, adjustment power metering device, metering method, and program3 Sep 2026US 2026/0259251 A1Mitsubishi Heavy Industries, Ltd.
- Calibration device and calibration method for signal generator23 Jul 2026US 2026/0211073 A1Anritsu Corporation
Most cited
By later US patents
- Analysis of a radio-frequency environment utilizing pulse masking354US 10,393,784 B2Raytheon Company · 2019
- Wireless power transmission system, and method for controlling wireless power transmission and wireless power reception273US 8,946,940 B2Samsung Electronics Co., Ltd. · 2015
- Detector system for identifying the frequency of a received signal useful in a channelized receiver176US 6,313,620 B1Northrop Grumman Corporation · 2001
- Communicating with implanted wireless sensor155US 7,245,117 B1CardioMEMS, Inc. · 2007
- Communicating with an implanted wireless sensor127US 7,550,978 B2CardioMEMS, Inc. · 2009