G01M 15/04
Testing internal-combustion engines
G01M15/04 (Testing internal-combustion engines) appears on 3,273 US grants and 2,729 published applications in this corpus.
Search patents in G01M- Granted patents
- 3,273
- Published applications
- 2,729
- Assignees
- 923
- Inventors
- 6,453
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 32 | 0 |
| 1977 | 31 | 0 |
| 1978 | 29 | 0 |
| 1979 | 17 | 0 |
| 1980 | 12 | 0 |
| 1981 | 25 | 0 |
| 1982 | 13 | 0 |
| 1983 | 30 | 0 |
| 1984 | 33 | 0 |
| 1985 | 26 | 0 |
| 1986 | 20 | 0 |
| 1987 | 27 | 0 |
| 1988 | 16 | 0 |
| 1989 | 19 | 0 |
| 1990 | 19 | 0 |
| 1991 | 27 | 0 |
| 1992 | 32 | 0 |
| 1993 | 48 | 0 |
| 1994 | 52 | 0 |
| 1995 | 63 | 0 |
| 1996 | 74 | 0 |
| 1997 | 53 | 0 |
| 1998 | 64 | 0 |
| 1999 | 53 | 0 |
| 2000 | 35 | 0 |
| 2001 | 56 | 20 |
| 2002 | 51 | 39 |
| 2003 | 62 | 64 |
| 2004 | 56 | 64 |
| 2005 | 52 | 49 |
| 2006 | 55 | 54 |
| 2007 | 52 | 45 |
| 2008 | 44 | 77 |
| 2009 | 45 | 98 |
| 2010 | 67 | 84 |
| 2011 | 69 | 70 |
| 2012 | 68 | 64 |
| 2013 | 75 | 139 |
| 2014 | 77 | 164 |
| 2015 | 105 | 230 |
| 2016 | 151 | 200 |
| 2017 | 173 | 212 |
| 2018 | 201 | 184 |
| 2019 | 192 | 177 |
| 2020 | 176 | 154 |
| 2021 | 158 | 141 |
| 2022 | 144 | 117 |
| 2023 | 100 | 95 |
| 2024 | 78 | 68 |
| 2025 | 64 | 71 |
| 2026 | 52 | 49 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01M 15/10By monitoring exhaust gases or combustion flame1,004
- G01M 15/042By monitoring a single specific parameter not covered by groups g01m15/06 -710
- G01M 15/11By detecting misfire590
- G01M 15/05By combined monitoring of two or more different engine parameters298
- G01M 15/12By monitoring vibrations266
- G01M 15/08By monitoring pressure in cylinders256
- G01M 15/06By monitoring positions of pistons or cranks243
- G01M 15/09By monitoring pressure in fluid ducts203
Recent patents
- Valve event monitoring sensor6 Oct 2026US 12,754,102 B2Resonance Systems, Inc.
- System and method for diagnosing a crankcase ventilation system of an internal combustion engine6 Oct 2026US 12,754,103 B2Volkswagen Aktiengesellschaft
- Gas sensor29 Sep 2026US 12,748,070 B2NGK Insulators, Ltd.
- Multi-sensor devices and systems for evaluating vehicle conditions29 Sep 2026US 12,749,500 B2ACV Auctions Inc.
- Internal combustion engine control device22 Sep 2026US 12,742,702 B2Hitachi Astemo, Ltd.
- Exhaust fume monitoring on autonomous trucks8 Oct 2026US 2026/0309582 A1TORC Robotics, Inc.
- System and method for monitoring a burner associated with an exhaust gas after-treatment apparatus of a vehicle1 Oct 2026US 2026/0298126 A1Ferrari S.P. A.
- Gas sensor and control method of gas sensor10 Sep 2026US 2026/0266759 A1NGK Insulators, Ltd.
- Fuel quality determination systems and associated methods of operation27 Aug 2026US 2026/0251103 A1Inpro/Seal LLC
- Engine diagnosis system and engine diagnosis method20 Aug 2026US 2026/0243628 A1Komatsu Ltd.
Most cited
By later US patents
- Internet-based vehicle-diagnostic system567US 6,611,740 B2NetworkCar · 2003
- Wireless diagnostic system for vehicles522US 6,732,031 B1Reynolds and Reynolds Holdings, Inc. · 2004
- Wireless diagnostic system and method for monitoring vehicles493US 6,636,790 B1Reynolds and Reynolds Holdings, Inc. · 2003
- Modular wireless diagnostic test and information system394US 5,884,202 AHewlett-Packard Company · 1999
- Analysis and profiling of vehicle fleet data378US 6,505,106 B1International Business Machines Corporation · 2003