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 filing trajectory.

24,492
US patents granted
F01
Parent CPC class
20
Active assignees
+17%
5-yr velocity

The verdict

Non-positive Displacement Machines OR Engines ranks #82 of 670 CPC technology areas - 24,492 US patents granted since 2015, with filing up 17% over five years.

#82
of 670 CPC technology areas
24,492
US patents granted, 2015–2025
General Electric
leading assignee (3,837)
+17%
filing velocity, last 5 yrs
Top assignee: General Electric Company (3,837 patents)

CPC subclass F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES - covers 24,492 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class F01 (MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES). See our CPC classification guide for how the system works.

The competitive landscape in F01D is shaped by 20 distinct companies actively filing in this space. General Electric Company leads with 3,837 patents, followed by United Technologies Corporation at 2,869 grants and Raytheon Technologies Corporation at 1,770.

Filing activity in F01D is up 17% 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 F01D innovation accelerating?

US utility-patent grants per year in F01D, 2015–2025 - recent five years are up 17% 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

About This Class

CPC subclass F01D belongs to class F01.

24,492 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 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).

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 Engin…Rolls-roycePratt & Whitney CanadaRolls-royceRtxRolls-royce North Ame…Mtu Aero EnginesSnecmaSiemens Aktiengesells…Mitsubishi ElectricHoneywell Internation…
Top 14 F01D assignees by class footprint. Bubble size = patents in F01D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class F01D?
CPC subclass F01D covers NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES. It belongs to CPC class F01 (MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES), with 24,492 US utility patents granted since 2015.
How many patents have been filed in F01D?
24,492 US utility patents were granted in CPC subclass F01D between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in F01D?
General Electric Company leads F01D with 3,837 patents, making it the most active assignee in this technology area.
How is patent data for F01D 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., F01) is a broad technology category. Subclasses like F01D 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.