PlainPatent

CPC technology class · F15

F15C - Fluid-circuit Elements Predominantly USED FOR Computing O…

Fluid-circuit elements predominantly used for computing or control purposes. 136 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

136
US patents granted
F15
Parent CPC class
14
Active assignees
-18%
5-yr velocity

The verdict

Fluid-circuit Elements Predominantly USED FOR Computing O… ranks #615 of 670 CPC technology areas - 136 US patents granted since 2015, with filing down 18% over five years.

#615
of 670 CPC technology areas
136
US patents granted, 2015–2025
Facebook
leading assignee (15)
-18%
filing velocity, last 5 yrs
Top assignee: Facebook Technologies, Llc (15 patents)

CPC subclass F15C - FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES - covers 136 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class F15 (FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL). See our CPC classification guide for how the system works.

The competitive landscape in F15C is shaped by 14 distinct companies actively filing in this space. Facebook Technologies, Llc leads with 15 patents, followed by Applied Biosystems, Llc at 8 grants and Cytonome/st, Llc at 5.

Filing activity in F15C is down 18% 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 F15C innovation accelerating?

US utility-patent grants per year in F15C, 2015–2025 - recent five years are down 18% versus 2015–2019.

0510152025 20152016201720182019202020212022202320242025 2

Who leads F15C?

The 12 most active assignees in FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES - wider bars mean more grants

patents

What this shows Facebook is the most active filer in F15C, holding 15 of the 136 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 F15C
Rank Company Patents in F15C
#1 Vortex Pipe Systems Llc 10
#2 Applied Biosystems, Llc 8
#3 Cytonome/st, Llc 5
#4 THRU Tubing Solutions, Inc. 4
#5 Dlhbowles, Inc. 3
#6 Rheonix, Inc. 2
#7 Tactus Technology, Inc. 1
#8 Leggett & Platt Canada Co. 1
#9 Control Components, Inc. 1
#10 Stratec SE 1
#11 Iridia, Inc. 1
#12 Dolphin Fluidics S.r.l. 1
#13 Jansen's Aircraft Systems Controls, Inc. 1
#14 Silicon Biosystems S.p.a. 1

About This Class

CPC subclass F15C belongs to class F15.

136 patents were granted in this class between 2015 and 2025.

14 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 F15C 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 F15C assignees by class footprint. Bubble size = patents in F15C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 F15C assignees by class footprint. Bubble size = patents in F15C. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 51015202530 024681012 Patents in F15C Avg claims / patent (company-wide) Vortex Pipe SystemsApplied BiosystemsCytonome/StThru Tubing SolutionsDlhbowlesRheonixTactus TechnologyLeggett & Platt CanadaControl ComponentsStratec SeIridiaDolphin Fluidics S R LJansen's Aircraft Sys…Silicon Biosystems S…
Top 14 F15C assignees by class footprint. Bubble size = patents in F15C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class F15C?
CPC subclass F15C covers FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES. It belongs to CPC class F15 (FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL), with 136 US utility patents granted since 2015.
How many patents have been filed in F15C?
136 US utility patents were granted in CPC subclass F15C between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in F15C?
Facebook Technologies, Llc leads F15C with 15 patents, making it the most active assignee in this technology area.
How is patent data for F15C 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., F15) is a broad technology category. Subclasses like F15C 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.