G01L 23/225
Circuit arrangements therefor
Official title: {circuit arrangements therefor}
G01L23/225 (Circuit arrangements therefor) appears on 495 US grants and 260 published applications in this corpus.
Search patents in G01L- Granted patents
- 495
- Published applications
- 260
- Assignees
- 152
- Inventors
- 813
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 9 | 0 |
| 1982 | 16 | 0 |
| 1983 | 13 | 0 |
| 1984 | 24 | 0 |
| 1985 | 11 | 0 |
| 1986 | 11 | 0 |
| 1987 | 11 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 10 | 0 |
| 1991 | 9 | 0 |
| 1992 | 13 | 0 |
| 1993 | 11 | 0 |
| 1994 | 13 | 0 |
| 1995 | 12 | 0 |
| 1996 | 10 | 0 |
| 1997 | 7 | 0 |
| 1998 | 13 | 0 |
| 1999 | 10 | 0 |
| 2000 | 9 | 0 |
| 2001 | 9 | 6 |
| 2002 | 14 | 11 |
| 2003 | 12 | 8 |
| 2004 | 13 | 24 |
| 2005 | 16 | 8 |
| 2006 | 12 | 19 |
| 2007 | 19 | 20 |
| 2008 | 14 | 24 |
| 2009 | 17 | 27 |
| 2010 | 21 | 17 |
| 2011 | 11 | 14 |
| 2012 | 17 | 7 |
| 2013 | 8 | 6 |
| 2014 | 8 | 5 |
| 2015 | 8 | 9 |
| 2016 | 6 | 15 |
| 2017 | 9 | 9 |
| 2018 | 12 | 3 |
| 2019 | 11 | 9 |
| 2020 | 9 | 7 |
| 2021 | 8 | 7 |
| 2022 | 4 | 1 |
| 2023 | 1 | 0 |
| 2024 | 1 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for adaptively managing engine knocking23 Jun 2026US 12,662,984 B2Caterpillar Inc.
- Knocking determination device and knocking control device9 Jul 2024US 12,033,444 B2Denso Corporation
- System and method for determining the timing of an engine event19 Sep 2023US 11,761,398 B2Ai Alpine US Bidco Inc
- Internal combustion engines having super knock mitigation controls and methods for their operation18 Oct 2022US 11,473,550 B2King Abdullah University of Science and Technology
- Engine apparatus and noise detection system4 Oct 2022US 11,460,375 B2Toyota Jidosha Kabushiki Kaisha
- Knock detection method, knock detection device, gas engine13 Aug 2026US 2026/0235473 A1Caterpillar Energy Solutions GmbH
- Systems and methods for adaptively managing engine knocking5 Mar 2026US 2026/0063099 A1Caterpillar Inc.
- Engine-knocking determining device and method15 May 2025US 2025/0155322 A1Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Gaseous fuel ignition quality tester, method for determining fuel ignition quality3 Oct 2024US 2024/0328884 A1Uchicago Argonne, LLC
- Knocking determination device and knocking control device22 Dec 2022US 2022/0406102 A1Denso Corporation
Most cited
By later US patents
- Method of avoiding abnormal combination in an internal combination engine and an arrangement for carrying out the method98US 4,372,119 ASaab-Scania Aktiebolag · 1983
- Self-diagnosing apparatus and method for determining occurence of failure in inner cylinder pressure responsive sensor applicable to engine combustion detecting/controlling system94US 5,469,735 AUnisia Jecs Corporation · 1995
- Control device for an automobile89US 5,361,213 AHitachi, Ltd. · 1994
- System for monitoring and/or controlling multiple cylinder engine performance63US 4,936,277 AMotorola, Inc. · 1990
- Preignition detection apparatus63US 5,905,193 AToyota Jidosha Kabushiki Kaisha · 1999