CPC technology class · F01

F01P - Cooling Of Machines Or Engines In General

Cooling of machines or engines in general; cooling of internal-combustion engines. 4,129 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

4,129
US patents granted: #4/8
in F01: 7.7%
F01 class share: -1%
5-yr velocity

The verdict

According to USPTO PatentsView, Cooling Of Machines Or Engines In General ranks #268 of 670 CPC technology areas - 4,129 US patents granted since 2015, with recorded grant volume down 1% over five years.

#268
of 670 CPC technology areas: 4,129
US patents granted, 2015–2025: Hyundai Motor
leading assignee (311): -1%
grant velocity, last 5 yrs

How F01P's grant cadence moved

Between 2020–2024, F01P recorded 1,798 grants versus 1,811 in 2015–2019 (-1% equal-window velocity). Across complete years, output peaked in 2019 at 494 grants and bottomed in 2024 at 232 (+113% peak-over-trough). Lead assignee Mahle International GmbH holds 1.4% of the class ; the top three share 3.6%.

Leaderboard read

F01P concentration, lead at 1.4%

Mahle International GmbH leads this historical grant record at 1.4% of F01P - foreign corporation assignees hold 71% of class grants (788 of 1,111). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 1.4%
Top three share: 3.6%
Lead over #2: 9

Where F01P sits inside F01

Among 8 subclasses in F01 (Machines OR Engines IN GENERAL; Engine Plants IN GENERAL; Steam Engines), F01P ranks #4 and holds 7.7% of the parent class's 53,585 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

F01D 24,492 F01N 12,144 F01L 4,152 F01M 3,398 F01K 2,854 F01C 1,662 F01B 754

Rising assignees active in F01P

Company-wide grant multiples (2022–2024 vs 2019–2021) among assignees with ≥5 patents in this subclass. Growth is company-wide; class patent counts are subclass-specific.

#1 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg 25x 0 → 25 company-wide · 8 in F01P
#2 BJ Energy Solutions, LLC 3.22x 36 → 116 company-wide · 5 in F01P
#3 Deutz Aktiengesellschaft 2.50x 6 → 15 company-wide · 10 in F01P
#4 International Engine Intellectual Property Company, LLC 2.46x 11 → 27 company-wide · 7 in F01P
#5 Nidec GPM GMBH 1.88x 8 → 15 company-wide · 9 in F01P

F01P grants by year, peak 2019 (494)

US utility-patent grants per year in F01P, 2015–2025 - recent five years are down 1% versus 2015–2019.

Mahle International

57
Cummins

48
Hanon Systems

43
Kubota

41
Brunswick

36
Yanmar Holdings

33
Nippon Thermostat

28
Valeo Systemes…

27
Scania Cv Ab

20
Pierburg Pump…

20
Avl List

17
Brose Fahrzeugteile &…

17

What this shows Hyundai Motor is the most active filer in F01P, holding 311 of the 4,129 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

View data table

Top patent holders in CPC subclass F01P
Rank	Company	Patents in F01P
#1	Mahle International GmbH	57
#2	Cummins Inc.	48
#3	Hanon Systems	43
#4	Kubota Corporation	41
#5	Brunswick Corporation	36
#6	Yanmar Holdings Co., Ltd.	33
#7	Nippon Thermostat Co., Ltd.	28
#8	Valeo Systemes Thermiques	27
#9	Scania CV AB	20
#10	Pierburg Pump Technology GMBH	20
#11	AVL List GMBH	17
#12	Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft	17
#13	Briggs & Stratton, LLC	15
#14	Yanmar Power Technology Co., Ltd.	15
#15	Yamada Manufacturing Co., Ltd.	15
#16	Mikuni Corporation	14
#17	MAN Truck &Bus AG	13
#18	Achates Power, Inc.	13
#19	Horton, Inc.	13
#20	Kobelco Construction Machinery Co., Ltd	10

Footprint here vs. claim strategy

Each dot is a leading F01P 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 F01P assignees by class footprint. Bubble size = patents in F01P. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near F01P's 4,129-grant footprint

Nationwide nearest neighbors for F01P (#268 of 670 by volume ; lead share 7.5%) - not the F01 parent-class siblings above.

Nearest by grant volume

F23R 4,138 B62J 4,111 F01L 4,152 F17C 4,101

Nearest by lead-assignee share

G03H 7.6% B82Y 7.5% H04W 7.6% B27N 7.5%

Questions about F01P

Which company holds the most patents in F01P?

Hyundai Motor Company leads F01P with 311 patents (1.4% of the subclass). By PatentsView assignee type, foreign corporations account for 71% of class grants.

Which F01P assignees grew fastest recently?

Among assignees with ≥5 grants in F01P, Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg shows the highest company-wide grant multiple (25x: 0 grants in 2019–2021 → 25 in 2022–2024) while holding 8 patents in this subclass. Growth is company-wide, not class-only.

How does F01P compare inside parent class F01?

Inside F01 (Machines OR Engines IN GENERAL; Engine Plants IN GENERAL; Steam Engines), F01P ranks #4 of 8 subclasses by grant volume and holds 7.7% of the parent class total. The largest sibling is F01D (24,492 grants).

What to do with this data

F01P in context - here's where to go next.

Mahle International GmbH leads F01P with 57 grants in this class. See full portfolio
F01P ranks #268 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class F01, the largest sibling subclass is F01D with 24,492 grants. Explore F01D

Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.

Methodology - F01P figures are USPTO PatentsView granted-utility totals for this subclass (4,129 grants in the tracked window).

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.