PlainPatent

CPC technology class · F03

F03C - Positive-displacement Engines Driven BY Liquids

Positive-displacement engines driven by liquids. 404 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

404
US patents granted
F03
Parent CPC class
20
Active assignees
+22%
5-yr velocity

The verdict

Positive-displacement Engines Driven BY Liquids ranks #557 of 670 CPC technology areas - 404 US patents granted since 2015, with filing up 22% over five years.

#557
of 670 CPC technology areas
404
US patents granted, 2015–2025
Robert Bosch
leading assignee (49)
+22%
filing velocity, last 5 yrs
Top assignee: Robert Bosch Gmbh (49 patents)

CPC subclass F03C - POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS - covers 404 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class F03 (MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR). See our CPC classification guide for how the system works.

The competitive landscape in F03C is shaped by 20 distinct companies actively filing in this space. Robert Bosch Gmbh leads with 49 patents, followed by Artemis Intelligent Power Limited at 13 grants and KYB Corporation at 9.

Filing activity in F03C is up 22% over the past five years versus 2015-2019, a sharp acceleration suggesting an emerging or fast-moving technology area. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is F03C innovation accelerating?

US utility-patent grants per year in F03C, 2015–2025 - recent five years are up 22% versus 2015–2019.

2030405060 20152016201720182019202020212022202320242025 22

Who leads F03C?

The 12 most active assignees in POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS - wider bars mean more grants

patents

What this shows Robert Bosch is the most active filer in F03C, holding 49 of the 404 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 F03C
Rank Company Patents in F03C
#1 Poclain Hydraulics Industrie 27
#2 Artemis Intelligent Power Limited 13
#3 KYB Corporation 9
#4 Hydro-gear Limited Partnership 9
#5 Danfoss Power Solutions Gmbh & Co. OHG 9
#6 Danfoss A/s 8
#7 Linde Hydraulics Gmbh & Co. KG 8
#8 Abaco Drilling Technologies Llc 7
#9 Danfoss Power Solutions Inc. 6
#10 Smith International, Inc. 5
#11 Clearmotion, Inc. 5
#12 Hydac Drive Center Gmbh 5
#13 Kanzaki Kokyukoki MFG. Co., Ltd. 4
#14 DANA Motion Systems Italia S.r.l. 4
#15 Liebherr Machines Bulle Sa 4
#16 Project Phoenix, Llc 4
#17 Mathers Hydraulics Technologies Pty Ltd 4
#18 Innas BV 4
#19 Norwich Technologies, Inc. 4
#20 Lifecell Corporation 3

About This Class

CPC subclass F03C belongs to class F03.

404 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 F03C 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 F03C assignees by class footprint. Bubble size = patents in F03C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 F03C assignees by class footprint. Bubble size = patents in F03C. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 0102030 Patents in F03C Avg claims / patent (company-wide) Poclain Hydraulics In…Artemis Intelligent P…KybHydro-gear PartnershipDanfoss Power Solutio…Danfoss A/SLinde Hydraulics & KgAbaco DrillingDanfoss Power Solutio…Smith InternationalClearmotionHydac Drive CenterKanzaki Kokyukoki MfgDana Motion Systems I…
Top 14 F03C assignees by class footprint. Bubble size = patents in F03C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class F03C?
CPC subclass F03C covers POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS. It belongs to CPC class F03 (MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR), with 404 US utility patents granted since 2015.
How many patents have been filed in F03C?
404 US utility patents were granted in CPC subclass F03C between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in F03C?
Robert Bosch Gmbh leads F03C with 49 patents, making it the most active assignee in this technology area.
How is patent data for F03C 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., F03) is a broad technology category. Subclasses like F03C 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.