G01L 23/222
Using piezoelectric devices
Official title: {using piezoelectric devices}
G01L23/222 (Using piezoelectric devices) appears on 190 US grants and 102 published applications in this corpus.
Search patents in G01L- Granted patents
- 190
- Published applications
- 102
- Assignees
- 71
- Inventors
- 352
- Latest grant
- 8 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 10 | 0 |
| 1982 | 8 | 0 |
| 1983 | 12 | 0 |
| 1984 | 10 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 5 |
| 2002 | 3 | 1 |
| 2003 | 6 | 6 |
| 2004 | 9 | 10 |
| 2005 | 5 | 10 |
| 2006 | 9 | 6 |
| 2007 | 4 | 5 |
| 2008 | 2 | 2 |
| 2009 | 3 | 9 |
| 2010 | 4 | 7 |
| 2011 | 5 | 2 |
| 2012 | 3 | 4 |
| 2013 | 4 | 6 |
| 2014 | 2 | 4 |
| 2015 | 2 | 3 |
| 2016 | 5 | 6 |
| 2017 | 4 | 2 |
| 2018 | 6 | 2 |
| 2019 | 0 | 1 |
| 2020 | 4 | 5 |
| 2021 | 6 | 4 |
| 2022 | 2 | 0 |
| 2023 | 0 | 2 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Sensor for measuring seating force of engine intake and exhaust valve and measuring method8 Jul 2025US 12,352,638 B2Harbin Engineering University
- Method for the robust identification of knocking in an internal combustion engine, control device, and motor vehicle24 Sep 2024US 12,098,685 B2Bayerische Motoren Werke Aktiengesellschaft
- Injector closed loop control12 Jul 2022US 11,384,722 B2Delphi Technologies IP Limited
- Knocking detection system and knocking detection method of internal combustion engine19 Apr 2022US 11,307,111 B2Toyota Jidosha Kabushiki Kaisha
- Ignition timing control device for internal combustion engine17 Aug 2021US 11,092,130 B2Toyota Jidosha Kabushiki Kaisha
- Method for the Robust Identification of Knocking in an Internal Combustion Engine, Control Device, and Motor Vehicle12 Oct 2023US 2023/0323826 A1Bayerische Motoren Werke Aktiengesellschaft
- Sensor for measuring seating force of engine intake and exhaust valve and measuring method13 Apr 2023US 2023/0113870 A1Harbin Engineering University
- Pressure detection signal processing device, engine control system, and program4 Nov 2021US 2021/0341347 A1Mikuni Corporation
- Pressure sensor6 May 2021US 2021/0131885 A1Vibration Measurement Solutions, Inc.
- Ignition timing control device for internal combustion engine25 Mar 2021US 2021/0088019 A1Toyota Jidosha Kabushiki Kaisha
Most cited
By later US patents
- Dynamic combustion characteristic sensor for internal combustion engine58US 4,491,010 AGeneral Motors Corporation · 1985
- Piezoelectric sensor and input device including same56US 7,152,482 B2National Institute of Advanced Industrial Science and Technology · 2006
- Fuel injection valve and pressure sensor combination52US 6,318,342 B1Robert Bosch GmbH · 2001
- Piezoelectric sensor45US 5,376,860 AOki Ceramic Industry Co, Ltd. · 1994
- Combustion pressure sensor designed to ensure stability of output characteristic and sensitivity44US 6,973,820 B2Denso Corporation · 2005