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 grant trajectory.

924
US patents granted
#2/3
in F15
11.3%
F15 class share
+7%
5-yr velocity

The verdict

According to USPTO PatentsView, Fluid Dynamics ranks #469 of 670 CPC technology areas - 924 US patents granted since 2015, with recorded grant volume up 7% over five years.

#469
of 670 CPC technology areas
924
US patents granted, 2015–2025
The Boeing
leading assignee (48)
+7%
grant velocity, last 5 yrs

How F15D's grant cadence moved

Between 2020–2024, F15D recorded 426 grants versus 398 in 2015–2019 (+7% equal-window velocity). Across complete years, output peaked in 2019 at 101 grants and bottomed in 2015 at 64 (+58% peak-over-trough). Lead assignee Vortex Pipe Systems LLC holds 1.8% of the class ; the top three share 4.1%.

Leaderboard read

F15D concentration, lead at 1.8%

Vortex Pipe Systems LLC leads this historical grant record at 1.8% of F15D - us corporation assignees hold 60% of class grants (146 of 243). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
1.8%

17 of 924 grants

Top three share
4.1%

of the class's recorded grants

Lead over #2
5

more grants than Crystaphase Products, Inc.

Where F15D sits inside F15

Among 3 subclasses in F15 (Fluid-pressure ACTUATORS; Hydraulics OR Pneumatics IN General), F15D ranks #2 and holds 11.3% of the parent class's 8,154 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

F15B 7,094 F15C 136

Rising assignees active in F15D

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. #1 Vortex Pipe Systems LLC 2.83x 6 → 17 company-wide · 17 in F15D
  2. #2 Fox Factory, Inc. 1.58x 102 → 161 company-wide · 5 in F15D
  3. #3 Japan Aerospace Exploration Agency 1.57x 37 → 58 company-wide · 5 in F15D
  4. #4 Taylor Made Golf Company, Inc. 0.84x 210 → 176 company-wide · 7 in F15D
  5. #5 Coflow JET, LLC 0.83x 6 → 5 company-wide · 7 in F15D

F15D grants by year, peak 2019 (101)

US utility-patent grants per year in F15D, 2015–2025 - recent five years are up 7% 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

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). 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…Coflow JetThru Tubing SolutionsFox FactoryJapan Aerospace…Deep ScienceGeneral FusionBaden-wuerttemberg…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).

Classes near F15D's 924-grant footprint

Nationwide nearest neighbors for F15D (#469 of 670 by volume ; lead share 5.2%) - not the F15 parent-class siblings above.

Nearest by grant volume

F23L 922 A23J 927 F04F 906 F42C 944

Nearest by lead-assignee share

B24C 5.2% C21C 5.2% H10F 5.2% B29D 5.2%

Questions about F15D

Which company holds the most patents in F15D?
The Boeing Company leads F15D with 48 patents (1.8% of the subclass). By PatentsView assignee type, us corporations account for 60% of class grants.
Which F15D assignees grew fastest recently?
Among assignees with ≥5 grants in F15D, Vortex Pipe Systems LLC shows the highest company-wide grant multiple (2.83x: 6 grants in 2019–2021 → 17 in 2022–2024) while holding 17 patents in this subclass. Growth is company-wide, not class-only.
How does F15D compare inside parent class F15?
Inside F15 (Fluid-pressure ACTUATORS; Hydraulics OR Pneumatics IN General), F15D ranks #2 of 3 subclasses by grant volume and holds 11.3% of the parent class total. The largest sibling is F15B (7,094 grants).

What to do with this data

F15D in context - here's where to go next.

  • Vortex Pipe Systems LLC leads F15D with 17 grants in this class. See full portfolio
  • F15D ranks #469 of 670 by grant volume among all tracked CPC technology areas. See the ranking
  • Inside parent class F15, the largest sibling subclass is F15B with 7,094 grants. Explore F15B

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

Methodology - F15D figures are USPTO PatentsView granted-utility totals for this subclass (924 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.