PlainPatent

CPC technology class · F15

F15D - Fluid Dynamics

Fluid dynamics, i.e. methods or means for influencing the flow of gases or liquids. 924 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

924
US patents granted
F15
Parent CPC class
20
Active assignees
+22%
5-yr velocity

The verdict

Fluid Dynamics ranks #469 of 670 CPC technology areas - 924 US patents granted since 2015, with filing up 22% over five years.

#469
of 670 CPC technology areas
924
US patents granted, 2015–2025
The Boeing
leading assignee (48)
+22%
filing velocity, last 5 yrs
Top assignee: The Boeing Company (48 patents)

CPC subclass F15D - FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS - covers 924 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 F15D is shaped by 20 distinct companies actively filing in this space. The Boeing Company leads with 48 patents, followed by Crystaphase Products, Inc. at 12 grants and VIV Solutions Llc at 9.

Filing activity in F15D 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 F15D innovation accelerating?

US utility-patent grants per year in F15D, 2015–2025 - recent five years are up 22% versus 2015–2019.

5060708090100110 20152016201720182019202020212022202320242025 58

Who leads F15D?

The 12 most active assignees in FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS - wider bars mean more grants

patents

What this shows The Boeing is the most active filer in F15D, holding 48 of the 924 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 F15D
Rank Company Patents in F15D
#1 Vortex Pipe Systems Llc 17
#2 Crystaphase Products, Inc. 12
#3 VIV Solutions Llc 9
#4 Taylor Made Golf Company, Inc. 7
#5 Canada Pipeline Accessories Company, Ltd. 7
#6 Coflow JET, Llc 7
#7 THRU Tubing Solutions, Inc. 6
#8 Fox Factory, Inc. 5
#9 Japan Aerospace Exploration Agency 5
#10 Deep Science, Llc 4
#11 General Fusion Inc. 4
#12 Baden-wuerttemberg Stiftung Ggmbh 4
#13 Biochemtex S.p.a. 4
#14 ESS 2 Tech, Llc 4
#15 Elemental Scientific, Inc. 3
#16 Emerson Process Management Regulator Technologies, Inc. 3
#17 Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. 3
#18 Mclaren Automotive Limited 3
#19 Kepco Engineering & Construction Company Inc. 3
#20 MSG Entertainment Group, Llc 3

About This Class

CPC subclass F15D belongs to class F15.

924 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 F15D 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 F15D assignees by class footprint. Bubble size = patents in F15D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 F15D assignees by class footprint. Bubble size = patents in F15D. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 51015202530 05101520 Patents in F15D Avg claims / patent (company-wide) Vortex Pipe SystemsCrystaphase ProductsViv SolutionsTaylor Made GolfCanada Pipeline Acces…Coflow JetThru Tubing SolutionsFox FactoryJapan Aerospace Explo…Deep ScienceGeneral FusionBaden-wuerttemberg St…Biochemtex S p AEss 2 Tech
Top 14 F15D assignees by class footprint. Bubble size = patents in F15D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class F15D?
CPC subclass F15D covers FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS. It belongs to CPC class F15 (FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL), with 924 US utility patents granted since 2015.
How many patents have been filed in F15D?
924 US utility patents were granted in CPC subclass F15D between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in F15D?
The Boeing Company leads F15D with 48 patents, making it the most active assignee in this technology area.
How is patent data for F15D 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 F15D 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.