PlainPatent

CPC technology class · F01

F01D - Non-positive Displacement Machines Or Engines

Non-positive displacement machines or engines, e.g. steam turbines. 24,492 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

24,492
US patents granted
#1/8
in F01
45.7%
F01 class share
+6%
5-yr velocity

The verdict

According to USPTO PatentsView, Non-positive Displacement Machines Or Engines ranks #82 of 670 CPC technology areas - 24,492 US patents granted since 2015, with recorded grant volume up 6% over five years.

#82
of 670 CPC technology areas
24,492
US patents granted, 2015–2025
General Electric
leading assignee (3,837)
+6%
grant velocity, last 5 yrs

How F01D's grant cadence moved

Between 2020–2024, F01D recorded 11,485 grants versus 10,815 in 2015–2019 (+6% equal-window velocity). Across complete years, output peaked in 2019 at 3,141 grants and bottomed in 2015 at 1,547 (+103% peak-over-trough). Lead assignee General Electric Company holds 15.7% of the class ; the top three share 34.6%.

Leaderboard read

F01D concentration, lead at 15.7%

General Electric Company leads this historical grant record at 15.7% of F01D - us corporation assignees hold 60% of class grants (13,364 of 22,147). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
15.7%

3,837 of 24,492 grants

Top three share
34.6%

of the class's recorded grants

Lead over #2
968

more grants than United Technologies Corporation

Where F01D sits inside F01

Among 8 subclasses in F01 (Machines OR Engines IN GENERAL; Engine Plants IN GENERAL; Steam Engines), F01D ranks #1 and holds 45.7% of the parent class's 53,585 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

F01N 12,144 F01L 4,152 F01P 4,129 F01M 3,398 F01K 2,854 F01C 1,662 F01B 754

Rising assignees active in F01D

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 RTX Corporation 662x 0 → 662 company-wide · 638 in F01D
  2. #2 Doosan Enerbility Co., Ltd. 121x 0 → 121 company-wide · 64 in F01D
  3. #3 GE Infrastructure Technology LLC 80x 2 → 160 company-wide · 99 in F01D
  4. #4 ICE Thermal Harvesting, LLC 45x 1 → 45 company-wide · 11 in F01D
  5. #5 Oliver Crispin Robotics Limited 28x 0 → 28 company-wide · 29 in F01D

F01D grants by year, peak 2019 (3,141)

US utility-patent grants per year in F01D, 2015–2025 - recent five years are up 6% versus 2015–2019.

1,0001,5002,0002,5003,0003,500 20152016201720182019202020212022202320242025 1,215

Who leads F01D?

The 12 most active assignees in Non-positive Displacement Machines OR Engines, e.g. Steam Turbines - wider bars mean more grants

patents

What this shows General Electric is the most active filer in F01D, holding 3,837 of the 24,492 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 F01D
Rank Company Patents in F01D
#1 General Electric Company 3,837
#2 United Technologies Corporation 2,869
#3 Raytheon Technologies Corporation 1,770
#4 Safran Aircraft Engines 1,240
#5 Rolls-royce plc 1,115
#6 Pratt & Whitney Canada Corp. 965
#7 Rolls-Royce Corporation 734
#8 RTX Corporation 638
#9 Rolls-Royce North American Technologies Inc. 508
#10 MTU Aero Engines AG 468
#11 Snecma 444
#12 Siemens Aktiengesellschaft 437
#13 Mitsubishi Electric Corporation 420
#14 Honeywell International Inc. 398
#15 Hamilton Sundstrand Corporation (HSC) 380
#16 Siemens Energy, Inc. 332
#17 BorgWarner Inc. 331
#18 Rolls-royce Deutschland Ltd & Co KG 278
#19 Mitsubishi Hitachi Power Systems, Ltd. 272
#20 IHI Corporation 226

Footprint here vs. claim strategy

Each dot is a leading F01D 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 F01D assignees by class footprint. Bubble size = patents in F01D. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 81012141618 010002000300040005000 Patents in F01D Avg claims / patent (company-wide) General ElectricUnitedRaytheonSafran Aircraft…Rolls-roycePratt & Whitney CanadaRolls-royceRtxRolls-royce North…Mtu Aero EnginesSnecmaSiemens Aktiengesellsc…Mitsubishi ElectricHoneywell Internationa…
Top 14 F01D assignees by class footprint. Bubble size = patents in F01D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near F01D's 24,492-grant footprint

Nationwide nearest neighbors for F01D (#82 of 670 by volume ; lead share 15.7%) - not the F01 parent-class siblings above.

Nearest by grant volume

H01J 24,482 F21V 23,679 A61L 25,308 H10H 25,379

Nearest by lead-assignee share

A47D 15.6% G09G 15.8% B67C 15.5% A44B 15.4%

Questions about F01D

Which company holds the most patents in F01D?
General Electric Company leads F01D with 3,837 patents (15.7% of the subclass). By PatentsView assignee type, us corporations account for 60% of class grants.
Which F01D assignees grew fastest recently?
Among assignees with ≥5 grants in F01D, RTX Corporation shows the highest company-wide grant multiple (662x: 0 grants in 2019–2021 → 662 in 2022–2024) while holding 638 patents in this subclass. Growth is company-wide, not class-only.
How does F01D compare inside parent class F01?
Inside F01 (Machines OR Engines IN GENERAL; Engine Plants IN GENERAL; Steam Engines), F01D ranks #1 of 8 subclasses by grant volume and holds 45.7% of the parent class total. The largest sibling is F01N (12,144 grants).

What to do with this data

F01D in context - here's where to go next.

  • General Electric Company leads F01D with 3,837 grants in this class. See full portfolio
  • F01D ranks #82 of 670 by grant volume among all tracked CPC technology areas. See the ranking
  • Inside parent class F01, the largest sibling subclass is F01N with 12,144 grants. Explore F01N

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

Methodology - F01D figures are USPTO PatentsView granted-utility totals for this subclass (24,492 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.