PlainPatent

CPC technology class · F02

F02F - Cylinders

Cylinders, pistons or casings, for combustion engines; arrangements of sealings in combustion engines. 2,743 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

2,743
US patents granted
F02
Parent CPC class
20
Active assignees
-12%
5-yr velocity

The verdict

Cylinders ranks #333 of 670 CPC technology areas - 2,743 US patents granted since 2015, with filing down 12% over five years.

#333
of 670 CPC technology areas
2,743
US patents granted, 2015–2025
Ford Global
leading assignee (217)
-12%
filing velocity, last 5 yrs
Top assignee: Ford Global Technologies, Llc (217 patents)

CPC subclass F02F - CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES - covers 2,743 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class F02 (COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS). See our CPC classification guide for how the system works.

The competitive landscape in F02F is shaped by 20 distinct companies actively filing in this space. Ford Global Technologies, Llc leads with 217 patents, followed by Caterpillar Inc. at 133 grants and Mazda Motor Corporation at 92.

Filing activity in F02F is down 12% over the past five years versus 2015-2019, a relatively steady filing pace. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is F02F innovation accelerating?

US utility-patent grants per year in F02F, 2015–2025 - recent five years are down 12% versus 2015–2019.

0100200300400500 20152016201720182019202020212022202320242025 72

Who leads F02F?

The 12 most active assignees in CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES - wider bars mean more grants

patents

What this shows Ford Global is the most active filer in F02F, holding 217 of the 2,743 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

Source USPTO PatentsView, granted utility patents As of 2015–2025 grant years
View data table
Top patent holders in CPC subclass F02F
Rank Company Patents in F02F
#1 Mahle International Gmbh 140
#2 Caterpillar Inc. 133
#3 Mazda Motor Corporation 92
#4 Cummins Inc. 64
#5 Tenneco Gmbh 64
#6 Federal-mogul Llc 58
#7 Achates Power, Inc. 53
#8 Riken 29
#9 Yanmar Power Technology Co., Ltd. 28
#10 AVL LIST Gmbh 27
#11 KS Kolbenschmidt Gmbh 26
#12 Federal-mogul Nurnberg Gmbh 22
#13 Brunswick Corporation 21
#14 TPR Co., Ltd. 21
#15 NOK Corporation 19
#16 MAN Truck &bus Ag 18
#17 Briggs & Stratton, Llc 17
#18 Isuzu Motors Limited 15
#19 Deutz Aktiengesellschaft 14
#20 Aquarius Engines (a.m.) Ltd. 11

About This Class

CPC subclass F02F belongs to class F02.

2,743 patents were granted in this class between 2015 and 2025.

20 companies actively patent in this space.

Classification System

Cooperative Patent Classification (CPC) is a hierarchical patent classification system used by the USPTO and EPO.

← All Technology Classes Technology Rankings →

Footprint here vs. claim strategy

Each dot is a leading F02F assignee, placed by how many patents it holds in this class (horizontal) against its company-wide average claims per patent (vertical) - a read on whether the class is led by broad-but-shallow filers or focused deep-claim players.

Top 14 F02F assignees by class footprint. Bubble size = patents in F02F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 F02F assignees by class footprint. Bubble size = patents in F02F. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 5101520 050100150 Patents in F02F Avg claims / patent (company-wide) Mahle InternationalCaterpillarMazda MotorCumminsTennecoFederal-mogulAchates PowerRikenYanmar Power Technolo…Avl ListKs KolbenschmidtFederal-mogul NurnbergBrunswickTpr
Top 14 F02F assignees by class footprint. Bubble size = patents in F02F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class F02F?
CPC subclass F02F covers CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES. It belongs to CPC class F02 (COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS), with 2,743 US utility patents granted since 2015.
How many patents have been filed in F02F?
2,743 US utility patents were granted in CPC subclass F02F between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in F02F?
Ford Global Technologies, Llc leads F02F with 217 patents, making it the most active assignee in this technology area.
How is patent data for F02F collected?
Patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office. It covers all US granted utility patents and assigns CPC codes based on the technology described in each patent.
What is the difference between CPC class and subclass?
A CPC class (e.g., F02) is a broad technology category. Subclasses like F02F provide finer granularity within that category. PlainPatent organizes data at the subclass level (4-character codes) for the most useful view of technology domains.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.