PlainPatent

CPC technology class · F05

F05D - Indexing Scheme For Aspects Relating To Non-positive-disp…

Indexing scheme for aspects relating to non-positive-displacement machines or engines, gas-turbines or jet-propulsion plants. 30,682 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

30,682
US patents granted
#1/3
in F05
78.3%
F05 class share
+40%
5-yr velocity

The verdict

According to USPTO PatentsView, Indexing Scheme For Aspects Relating To Non-positive-disp… ranks #63 of 670 CPC technology areas - 30,682 US patents granted since 2015, with recorded grant volume up 40% over five years.

#63
of 670 CPC technology areas
30,682
US patents granted, 2015–2025
General Electric
leading assignee (4,320)
+40%
grant velocity, last 5 yrs

How F05D's grant cadence moved

Between 2020–2024, F05D recorded 16,091 grants versus 11,523 in 2015–2019 (+40% equal-window velocity). Across complete years, output peaked in 2020 at 3,919 grants and bottomed in 2015 at 1,452 (+170% peak-over-trough). Lead assignee General Electric Company holds 14.1% of the class ; the top three share 30.2%.

Leaderboard read

F05D concentration, lead at 14.1%

General Electric Company leads this historical grant record at 14.1% of F05D - us corporation assignees hold 58% of class grants (15,809 of 27,218). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
14.1%

4,320 of 30,682 grants

Top three share
30.2%

of the class's recorded grants

Lead over #2
1,388

more grants than United Technologies Corporation

Where F05D sits inside F05

Among 3 subclasses in F05 (Indexing Schemes Relating TO Engines OR Pumps IN Various Subclasses OF Classes F01-f04), F05D ranks #1 and holds 78.3% of the parent class's 39,173 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

F05B 7,808 F05C 683

Rising assignees active in F05D

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 · 828 in F05D
  2. #2 Doosan Enerbility Co., Ltd. 121x 0 → 121 company-wide · 75 in F05D
  3. #3 GE Infrastructure Technology LLC 80x 2 → 160 company-wide · 122 in F05D
  4. #4 Collins Engine Nozzles, Inc. 74x 0 → 74 company-wide · 51 in F05D
  5. #5 Copeland LP 47x 0 → 47 company-wide · 8 in F05D

F05D grants by year, peak 2020 (3,919)

US utility-patent grants per year in F05D, 2015–2025 - recent five years are up 40% versus 2015–2019.

1,0002,0003,0004,0005,000 20152016201720182019202020212022202320242025 1,863

Who leads F05D?

The 12 most active assignees in Indexing Scheme FOR Aspects Relating TO Non-positive-displacement Machines OR Engines, Gas-turbines OR Jet-propulsion Plants - wider bars mean more grants

patents

What this shows General Electric is the most active filer in F05D, holding 4,320 of the 30,682 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 F05D
Rank Company Patents in F05D
#1 General Electric Company 4,320
#2 United Technologies Corporation 2,932
#3 Raytheon Technologies Corporation 2,019
#4 Safran Aircraft Engines 1,380
#5 Rolls-royce plc 1,364
#6 Pratt & Whitney Canada Corp. 1,334
#7 RTX Corporation 828
#8 Rolls-Royce Corporation 794
#9 Rolls-Royce North American Technologies Inc. 601
#10 Mitsubishi Electric Corporation 574
#11 Hamilton Sundstrand Corporation (HSC) 562
#12 Honeywell International Inc. 482
#13 Snecma 424
#14 MTU Aero Engines AG 416
#15 Siemens Aktiengesellschaft 399
#16 BorgWarner Inc. 358
#17 Rolls-royce Deutschland Ltd & Co KG 338
#18 Rohr, Inc. 287
#19 IHI Corporation 281
#20 Mitsubishi Hitachi Power Systems, Ltd. 275

Footprint here vs. claim strategy

Each dot is a leading F05D 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 F05D assignees by class footprint. Bubble size = patents in F05D. 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 F05D Avg claims / patent (company-wide) General ElectricUnitedRaytheonSafran Aircraft…Rolls-roycePratt & Whitney CanadaRtxRolls-royceRolls-royce North…Mitsubishi ElectricHamilton Sundstrand…Honeywell Internationa…SnecmaMtu Aero Engines
Top 14 F05D assignees by class footprint. Bubble size = patents in F05D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near F05D's 30,682-grant footprint

Nationwide nearest neighbors for F05D (#63 of 670 by volume ; lead share 14.1%) - not the F05 parent-class siblings above.

Nearest by grant volume

H03K 30,872 A61N 30,889 H10F 31,010 B60L 29,944

Nearest by lead-assignee share

G11C 14.1% A24F 14.1% G04C 14.1% F03D 14.2%

Questions about F05D

Which company holds the most patents in F05D?
General Electric Company leads F05D with 4,320 patents (14.1% of the subclass). By PatentsView assignee type, us corporations account for 58% of class grants.
Which F05D assignees grew fastest recently?
Among assignees with ≥5 grants in F05D, RTX Corporation shows the highest company-wide grant multiple (662x: 0 grants in 2019–2021 → 662 in 2022–2024) while holding 828 patents in this subclass. Growth is company-wide, not class-only.
How does F05D compare inside parent class F05?
Inside F05 (Indexing Schemes Relating TO Engines OR Pumps IN Various Subclasses OF Classes F01-f04), F05D ranks #1 of 3 subclasses by grant volume and holds 78.3% of the parent class total. The largest sibling is F05B (7,808 grants).

What to do with this data

F05D in context - here's where to go next.

  • General Electric Company leads F05D with 4,320 grants in this class. See full portfolio
  • F05D ranks #63 of 670 by grant volume among all tracked CPC technology areas. See the ranking
  • Inside parent class F05, the largest sibling subclass is F05B with 7,808 grants. Explore F05B

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

Methodology - F05D figures are USPTO PatentsView granted-utility totals for this subclass (30,682 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.