G01R 23/15
Indicating that frequency of pulses is either above or below a predetermined
Official title: Indicating that frequency of pulses is either above or below a predetermined value or within or outside a predetermined range of values, by making use of non-linear or digital elements {(indicating that pulse width is above or below a certain limit)}
G01R23/15 (Indicating that frequency of pulses is either above or below a predetermined) appears on 225 US grants and 130 published applications in this corpus.
Search patents in G01R- Granted patents
- 225
- Published applications
- 130
- Assignees
- 175
- Inventors
- 384
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 9 | 0 |
| 1978 | 10 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 16 | 0 |
| 1983 | 9 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 7 | 0 |
| 1987 | 10 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 2 |
| 2004 | 0 | 2 |
| 2005 | 1 | 0 |
| 2006 | 2 | 3 |
| 2007 | 1 | 2 |
| 2008 | 2 | 6 |
| 2009 | 1 | 3 |
| 2010 | 4 | 3 |
| 2011 | 3 | 4 |
| 2012 | 8 | 10 |
| 2013 | 5 | 10 |
| 2014 | 6 | 6 |
| 2015 | 7 | 8 |
| 2016 | 7 | 5 |
| 2017 | 4 | 7 |
| 2018 | 5 | 7 |
| 2019 | 8 | 5 |
| 2020 | 7 | 7 |
| 2021 | 6 | 8 |
| 2022 | 4 | 7 |
| 2023 | 9 | 7 |
| 2024 | 10 | 4 |
| 2025 | 5 | 11 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for evaluating the degradation level of capacitors of a power filter, adjustable speed drive and power converter provided for performing the method9 Jun 2026US 12,650,477 B2Danfoss Power Electronics A/S
- External crystal oscillator cycle duration and variation tracking10 Mar 2026US 12,573,983 B2Hewlett-Packard Development Company, L. P.
- Sensorless chatter detection3 Feb 2026US 12,539,574 B2Fanuc Corporation
- Systems and methods for testing electrical connections between a chip and external circuitry25 Nov 2025US 12,481,007 B2NXP B. V.
- Ultra-wideband communication system7 Oct 2025US 12,436,257 B2DecaWave, Ltd.
- Sensorless chatter detection21 May 2026US 2026/0138226 A1Fanuc Corporation
- System and method for continuous monitoring of sub-synchronous oscillations5 Mar 2026US 2026/0063693 A1Eaton Intelligent Power Limited
- Method for detecting a failure of a rectifier2 Oct 2025US 2025/0306068 A1Mahle International GmbH
- Ultra-wideband communication system2 Oct 2025US 2025/0306193 A1DecaWave, Ltd.
- Remote controlled construction equipment with a power supply diagnostics function18 Sep 2025US 2025/0290285 A1Husqvarna AB
Most cited
By later US patents
- Analysis of a radio-frequency environment utilizing pulse masking354US 10,393,784 B2Raytheon Company · 2019
- Flame detector123US 4,157,506 ACombustion Engineering, Inc. · 1979
- Digital programmable tone detector47US 4,021,653 AMotorola, Inc. · 1977
- Automatic transfer control device and frequency monitor38US 4,231,029 AWestinghouse Electric Corp. · 1980
- Probe having passive means transmitting an output signal by reactive coupling38US 4,339,714 ARenishaw Electrical Limited · 1982