PlainPatent

CPC technology class · F05

F05C - Indexing Scheme Relating TO Materials

Indexing scheme relating to materials, material properties or material characteristics for machines, engines or pumps other than non-positive-displacement machines or engines. 683 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

683
US patents granted
F05
Parent CPC class
20
Active assignees
-28%
5-yr velocity

The verdict

Indexing Scheme Relating TO Materials ranks #505 of 670 CPC technology areas - 683 US patents granted since 2015, with filing down 28% over five years.

#505
of 670 CPC technology areas
683
US patents granted, 2015–2025
Ford Global
leading assignee (27)
-28%
filing velocity, last 5 yrs
Top assignee: Ford Global Technologies, Llc (27 patents)

CPC subclass F05C - INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES - covers 683 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class F05 (INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04). See our CPC classification guide for how the system works.

The competitive landscape in F05C is shaped by 20 distinct companies actively filing in this space. Ford Global Technologies, Llc leads with 27 patents, followed by Emerson Climate Technologies, Inc. at 15 grants and Taiho Kogyo Co., Ltd. at 15.

Filing activity in F05C is down 28% over the past five years versus 2015-2019, a notable slowdown that may signal a maturing field. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is F05C innovation accelerating?

US utility-patent grants per year in F05C, 2015–2025 - recent five years are down 28% versus 2015–2019.

20406080100 20152016201720182019202020212022202320242025 24

Who leads F05C?

The 12 most active assignees in INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES - wider bars mean more grants

patents

What this shows Ford Global is the most active filer in F05C, holding 27 of the 683 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 F05C
Rank Company Patents in F05C
#1 Tenneco Gmbh 17
#2 Emerson Climate Technologies, Inc. 15
#3 Taiho Kogyo Co., Ltd. 15
#4 Federal-mogul Llc 9
#5 Hitachi Industrial Equipment Systems Co., Ltd. 7
#6 Abaco Drilling Technologies Llc 6
#7 Edwards Limited 5
#8 Fujitsu General Limited 4
#9 Roper PUMP Company, Llc 4
#10 Quantex Patents Limited 4
#11 Achates Power, Inc. 3
#12 Danfoss Power Solutions Gmbh & Co. OHG 3
#13 Blade Dynamics Limited 3
#14 Nabtesco Automotive Corporation 3
#15 Kaeser Kompressoren SE 3
#16 Magna Powertrain BAD Homburg Gmbh 3
#17 Bleistahl-produktions Gmbh & Co KG 3
#18 REME Technologies, Llc 3
#19 Yamada Manufacturing Co., Ltd. 2
#20 Exergyn, Ltd. 2

About This Class

CPC subclass F05C belongs to class F05.

683 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 F05C 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 F05C assignees by class footprint. Bubble size = patents in F05C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 F05C assignees by class footprint. Bubble size = patents in F05C. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 0510152025 05101520 Patents in F05C Avg claims / patent (company-wide) TennecoEmerson ClimateTaiho KogyoFederal-mogulHitachi Industrial Eq…Abaco DrillingEdwardsFujitsu GeneralRoper PumpQuantex PatentsAchates PowerDanfoss Power Solutio…Blade DynamicsNabtesco Automotive
Top 14 F05C assignees by class footprint. Bubble size = patents in F05C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class F05C?
CPC subclass F05C covers INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES. It belongs to CPC class F05 (INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04), with 683 US utility patents granted since 2015.
How many patents have been filed in F05C?
683 US utility patents were granted in CPC subclass F05C between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in F05C?
Ford Global Technologies, Llc leads F05C with 27 patents, making it the most active assignee in this technology area.
How is patent data for F05C 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., F05) is a broad technology category. Subclasses like F05C 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.