G01R 23/00
Arrangements for measuring frequencies
Official title: Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
G01R23/00 (Arrangements for measuring frequencies) appears on 2,633 US grants and 1,849 published applications in this corpus.
Search patents in G01R- Granted patents
- 2,633
- Published applications
- 1,849
- Assignees
- 1,271
- Inventors
- 5,113
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 43 | 0 |
| 1977 | 46 | 0 |
| 1978 | 45 | 0 |
| 1979 | 28 | 0 |
| 1980 | 26 | 0 |
| 1981 | 34 | 0 |
| 1982 | 47 | 0 |
| 1983 | 32 | 0 |
| 1984 | 40 | 0 |
| 1985 | 36 | 0 |
| 1986 | 41 | 0 |
| 1987 | 64 | 0 |
| 1988 | 60 | 0 |
| 1989 | 54 | 0 |
| 1990 | 46 | 0 |
| 1991 | 41 | 0 |
| 1992 | 39 | 0 |
| 1993 | 25 | 0 |
| 1994 | 36 | 0 |
| 1995 | 37 | 0 |
| 1996 | 41 | 0 |
| 1997 | 26 | 0 |
| 1998 | 42 | 0 |
| 1999 | 23 | 0 |
| 2000 | 29 | 0 |
| 2001 | 42 | 7 |
| 2002 | 38 | 24 |
| 2003 | 44 | 31 |
| 2004 | 23 | 29 |
| 2005 | 25 | 29 |
| 2006 | 33 | 39 |
| 2007 | 24 | 32 |
| 2008 | 29 | 41 |
| 2009 | 18 | 67 |
| 2010 | 41 | 56 |
| 2011 | 29 | 38 |
| 2012 | 47 | 62 |
| 2013 | 57 | 77 |
| 2014 | 72 | 100 |
| 2015 | 75 | 123 |
| 2016 | 92 | 99 |
| 2017 | 96 | 97 |
| 2018 | 106 | 125 |
| 2019 | 118 | 109 |
| 2020 | 130 | 110 |
| 2021 | 107 | 114 |
| 2022 | 83 | 109 |
| 2023 | 84 | 102 |
| 2024 | 89 | 89 |
| 2025 | 98 | 81 |
| 2026 | 52 | 59 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and device for testing a voltage converter29 Sep 2026US 12,748,163 B2Omicron Electronics GmbH
- 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.
- Wireless communication device and method for enhanced resolution spectrum monitoring25 Aug 2026US 12,716,924 B1Peltbeam Inc.
- Electromagnetically induced grating-based electric field detection system and method18 Aug 2026US 12,710,460 B2Korea Research Institute of Standards and Science
- Partial discharge monitoring system and partial discharge monitoring method18 Aug 2026US 12,710,465 B2Ls Cable & System Ltd.
- 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
- Method for detecting the presence or absence of a neutral conductive line in a multiphase ac voltage source1 Oct 2026US 2026/0302970 A1Schaeffler Technologies AG & Co. KG
- Electrical parameter measuring device24 Sep 2026US 2026/0287618 A1Solfacil Energia Solar Tecnologia E Servicos Financeiros Ltda
- Short-circuit detection in a bifilar electric drive system24 Sep 2026US 2026/0287684 A1Rolls-Royce Deutschland Ltd & Co KG
Most cited
By later US patents
- Analysis of a radio-frequency environment utilizing pulse masking354US 10,393,784 B2Raytheon Company · 2019
- Electrical power line and substation monitoring apparatus and systems325US 4,758,962 A1988
- Wireless power transmission system, and method for controlling wireless power transmission and wireless power reception273US 8,946,940 B2Samsung Electronics Co., Ltd. · 2015
- Analog spectrum display for environmental control248US 5,973,662 AJohnson Controls Technology Company · 1999
- Signal pulse detection scheme for use in real-time spectrum analysis234US 7,292,656 B2Cognio, Inc. · 2007