F02B
Internal-combustion piston engines
Official title: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
F02B (Internal-combustion piston engines) appears on 42,567 US grants and 25,344 published applications in this corpus.
Search patents in F02B- Granted patents
- 42,567
- Published applications
- 25,344
- Assignees
- 6,115
- Inventors
- 49,708
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 625 | 0 |
| 1977 | 551 | 0 |
| 1978 | 637 | 0 |
| 1979 | 427 | 0 |
| 1980 | 590 | 0 |
| 1981 | 595 | 0 |
| 1982 | 586 | 0 |
| 1983 | 690 | 0 |
| 1984 | 949 | 0 |
| 1985 | 911 | 0 |
| 1986 | 733 | 0 |
| 1987 | 877 | 0 |
| 1988 | 862 | 0 |
| 1989 | 964 | 0 |
| 1990 | 953 | 0 |
| 1991 | 1006 | 0 |
| 1992 | 990 | 0 |
| 1993 | 921 | 0 |
| 1994 | 844 | 0 |
| 1995 | 804 | 0 |
| 1996 | 914 | 0 |
| 1997 | 737 | 0 |
| 1998 | 834 | 0 |
| 1999 | 806 | 0 |
| 2000 | 871 | 0 |
| 2001 | 1010 | 319 |
| 2002 | 964 | 973 |
| 2003 | 1067 | 1100 |
| 2004 | 905 | 1033 |
| 2005 | 869 | 886 |
| 2006 | 818 | 889 |
| 2007 | 656 | 949 |
| 2008 | 660 | 918 |
| 2009 | 498 | 1073 |
| 2010 | 638 | 969 |
| 2011 | 609 | 976 |
| 2012 | 729 | 976 |
| 2013 | 781 | 1169 |
| 2014 | 910 | 1317 |
| 2015 | 1020 | 1430 |
| 2016 | 1083 | 1480 |
| 2017 | 1190 | 1475 |
| 2018 | 1392 | 1473 |
| 2019 | 1467 | 1382 |
| 2020 | 1422 | 1248 |
| 2021 | 1202 | 898 |
| 2022 | 988 | 717 |
| 2023 | 743 | 594 |
| 2024 | 611 | 433 |
| 2025 | 446 | 367 |
| 2026 | 212 | 300 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F02B 75/00Internal-combustion piston engines: other engines12,590
- F02B 37/00Engines characterised by provision of pumps driven at least for part of6,790
- F02B 3/00Engines characterised by air compression and subsequent fuel addition5,825
- F02B 1/00Engines characterised by fuel-air mixture compression5,493
- F02B 61/00Adaptations of engines for driving vehicles or for driving propellers4,406
- F02B 2275/00Internal-combustion piston engines: other engines, components or details, not provided for inIndexing code3,902
- F02B 29/00Engines characterised by provision for charging or scavenging not provided for in2,918
- F02B 63/00Adaptations of engines for driving pumps, hand-held tools or electric generators2,699
All 46 main groupsShow fewer
- F02B 33/00Engines characterised by provision of pumps for charging or scavenging2,485
- F02B 39/00Component parts, details, or accessories relating to, driven charging or scavenging pumps2,397
- F02B 23/00Internal-combustion piston engines: other engines characterised by special shape or construction of2,215
- F02B 77/00Component parts, details or accessories, not otherwise provided for2,208
- F02B 67/00Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided1,412
- F02B 43/00Engines characterised by operating on gaseous fuels1,387
- F02B 53/00Internal-combustion aspects of rotary-piston or oscillating-piston engines1,367
- F02B 19/00Engines characterised by precombustion chambers1,337
- F02B 25/00Engines characterised by using fresh charge for scavenging cylinders1,122
- F02B 31/00Modifying induction systems for imparting a rotation to the charge in the1,100
- F02B 27/00Use of kinetic or wave energy of charge in induction systems, or968
- F02B 41/00Engines characterised by special means for improving conversion of heat or pressure884
- F02B 47/00Methods of operating engines involving adding non-fuel substances or anti-knock agents to858
- F02B 17/00Engines characterised by means for effecting stratification of charge in cylinders775
- F02B 71/00Free-piston engines445
- F02B 55/00Internal-combustion aspects of rotary pistons428
- F02B 51/00Internal-combustion piston engines: other methods of operating engines involving pretreating of, or367
- F02B 69/00Internal-combustion engines convertible into other combustion-engine type, not provided for in f02b11/00256
- F02B 21/00Engines characterised by air-storage chambers253
- F02B 57/00Internal-combustion aspects of rotary engines in which the combusted gases displace one227
- F02B 73/00Combinations of two or more engines, not otherwise provided for194
- F02B 7/00Engines characterised by the fuel-air charge being ignited by compression ignition of152
- F02B 11/00Engines characterised by both fuel-air mixture compression and air compression, or characterised141
- F02B 9/00Engines characterised by other types of ignition114
- F02B 2201/00FuelsIndexing code93
- F02B 65/00Adaptations of engines for special uses not provided for in groups f02b61/0085
- F02B 45/00Engines characterised by operating on non-liquid fuels other than gas84
- F02B 5/00Engines characterised by positive ignition78
- F02B 2730/00Internal-combustion engines with pistons rotating or oscillating with relation to the housingIndexing code55
- F02B 59/00Internal-combustion aspects of other reciprocating-piston engines with movable48
- F02B 13/00Engines characterised by the introduction of liquid fuel into cylinders by use38
- F02B 15/00Engines characterised by the method of introducing liquid fuel into cylinders and35
- F02B 2700/00Measures relating to the combustion process without indication of the kind ofIndexing code35
- F02B 35/00Engines characterised by provision of pumps for sucking combustion residues from cylinders34
- F02B 2720/00Engines with liquid fuelIndexing code21
- F02B 2710/00Gas enginesIndexing code18
- F02B 49/00Methods of operating air-compressing compression-ignition engines involving introduction of small quantities of9
- F02B 79/00Running-in of internal-combustion engines8
Recent patents
- Tool for assembly and storage of rotary engine6 Oct 2026US 12,752,382 B2Pratt & Whitney Canada Corp.
- Internal combustion engine with combustion pre-chamber6 Oct 2026US 12,753,717 B2Brp-Rotax GmbH & Co. KG
- Hybrid hydrogen fuel cell combustor power system6 Oct 2026US 12,755,989 B2Caterpillar Inc.
- Multi-motor electrical generator system6 Oct 2026US 12,756,270 B2Iny LLC
- Lubricant compositions for reduced pre-ignition in hydrogen fueled engines29 Sep 2026US 12,747,407 B2Infineum International Limited
- Generator enclosure8 Oct 2026US 2026/0308924 A1Discovery Energy, LLC
- Two-cycle engine with scavaging passage8 Oct 2026US 2026/0309071 A1Maruyama Mfg.Co., Inc.
- Supercharging compressor for an internal combustion engine8 Oct 2026US 2026/0309072 A1Ferrari S.P. A.
- Entryway system including a divided volute turbocharger8 Oct 2026US 2026/0309073 A1BorgWarner Inc.
- Rotary internal combustion engine with integrated pump8 Oct 2026US 2026/0309074 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Internal combustion engine with auxiliary combustion chamber1,410US 4,106,446 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1978
- Internal combustion engine1,364US 4,054,108 AGeneral Motors Corporation · 1977
- Methods for identifying nucleic acid ligands856US 5,270,163 AUniversity Research Corporation · 1993
- Method and apparatus for application of thermal spray coatings to engine blocks598US 5,271,967 AGeneral Motors Corporation · 1993
- Flow meter567US 6,874,480 B1Combustion Dynamics Corp. · 2005