G01R 23/06
By converting frequency into an amplitude of current or voltage
Official title: by converting frequency into an amplitude of current or voltage
G01R23/06 (By converting frequency into an amplitude of current or voltage) appears on 118 US grants and 74 published applications in this corpus.
Search patents in G01R- Granted patents
- 118
- Published applications
- 74
- Assignees
- 120
- Inventors
- 232
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 2 |
| 2003 | 2 | 1 |
| 2004 | 0 | 2 |
| 2005 | 1 | 2 |
| 2006 | 3 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 3 | 3 |
| 2011 | 1 | 2 |
| 2012 | 3 | 4 |
| 2013 | 1 | 2 |
| 2014 | 4 | 4 |
| 2015 | 2 | 2 |
| 2016 | 1 | 3 |
| 2017 | 3 | 3 |
| 2018 | 5 | 7 |
| 2019 | 3 | 6 |
| 2020 | 6 | 5 |
| 2021 | 6 | 4 |
| 2022 | 3 | 4 |
| 2023 | 3 | 5 |
| 2024 | 5 | 4 |
| 2025 | 8 | 3 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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.
- RF-based special material detection system with secure multi-dimensional authentication12 May 2026US 12,625,089 B2Quantum IP, LLC
- Inductive conductivity sensor circuit, inductive conductivity sensor and method of operating the circuit16 Dec 2025US 12,498,439 B2Endress+Hauser Conducta GmbH+Co. KG
- Method and an apparatus for converting an input frequency to a voltage signal using a passive filter9 Dec 2025US 12,493,065 B2King Fahd University of Petroleum and Minerals
- Method for testing switch signals of an inverter of an electric machine controlled via a pulse-width modulation4 Nov 2025US 12,461,133 B2Schaeffler Technologies AG & Co. KG
- A frequency monitoring device23 Apr 2026US 2026/0113127 A1Saab AB
- Rf-based special material detection system with secure multi-dimensional authentication8 Jan 2026US 2026/0009741 A1Quantum IP, LLC
- Frequency Monitoring Circuitry with Voltage Conversion16 Oct 2025US 2025/0321254 A1Apple Inc.
- Method and an apparatus for converting an input frequency to a voltage signal using a passive filter21 Aug 2025US 2025/0264508 A1King Fahd University of Petroleum and Minerals
- Wireless power transmission system for detecting optimal resonance frequency and method of detecting optimal resonance frequency using the same23 Jan 2025US 2025/0030272 A1Banf Co., Ltd.
Most cited
By later US patents
- Block distortion detection method, block distortion detection apparatus, block distortion removal method, and block distortion removal apparatus71US 7,031,393 B2Matsushita Electric Industrial Co., Ltd. · 2006
- Apparatus and method for the detection and measurement of liquid water and ice layers on the surfaces of solid materials64US 5,686,841 AStolar, Inc. · 1997
- Linear position sensor using a coaxial resonant cavity56US 4,737,705 ACaterpillar Inc. · 1988
- Calibrating and measuring circuit for a capacitive probe-type instrument48US 4,130,796 AWestinghouse Electric Corp. · 1978
- Control circuitry for quartz crystal deposition monitor24US 5,117,192 ALeybold Inficon, Inc. · 1992