PlainPatent

CPC technology class · F05

F05B - Indexing Scheme Relating TO WIND

Indexing scheme relating to wind, spring, weight, inertia or like motors, to machines or engines for liquids covered by subclasses f03b, f03d and f03g. 7,808 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

7,808
US patents granted
F05
Parent CPC class
20
Active assignees
+59%
5-yr velocity

The verdict

Indexing Scheme Relating TO WIND ranks #198 of 670 CPC technology areas - 7,808 US patents granted since 2015, with filing up 59% over five years.

#198
of 670 CPC technology areas
7,808
US patents granted, 2015–2025
Vestas Wind Systems A…
leading assignee (859)
+59%
filing velocity, last 5 yrs
Top assignee: Vestas Wind Systems A/s (859 patents)

CPC subclass F05B - INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G - covers 7,808 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class F05 (INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04). See our CPC classification guide for how the system works.

The competitive landscape in F05B is shaped by 20 distinct companies actively filing in this space. Vestas Wind Systems A/s leads with 859 patents, followed by General Electric Company at 685 grants and Siemens Gamesa Renewable Energy at 388.

Filing activity in F05B is up 59% 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 F05B innovation accelerating?

US utility-patent grants per year in F05B, 2015–2025 - recent five years are up 59% versus 2015–2019.

4005006007008009001,000 20152016201720182019202020212022202320242025 562

Who leads F05B?

The 12 most active assignees in INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G - wider bars mean more grants

patents

What this shows Vestas Wind Systems A… is the most active filer in F05B, holding 859 of the 7,808 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 F05B
Rank Company Patents in F05B
#1 Vestas Wind Systems A/s 859
#2 General Electric Company 685
#3 Siemens Gamesa Renewable Energy 388
#4 Wobben Properties Gmbh 261
#5 Siemens Aktiengesellschaft 184
#6 General Electric Renovables Espana, S.l. 129
#7 Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. 80
#8 LM WP Patent Holding A/s 71
#9 LM WIND Power A/s 67
#10 LONE GULL Holdings, Ltd. 47
#11 Siemens Gamesa Renewable Energy Innovation & Technology S. L. 45
#12 Alstom Renewable Technologies 42
#13 Blade Dynamics Limited 41
#14 NTN Corporation 37
#15 Senvion SE 37
#16 Gamesa Innovation & Technology, S. L. 34
#17 Senvion Gmbh 34
#18 Xinjiang Goldwind Science & Technology Co., Ltd. 31
#19 Nordex Energy SE & Co. KG 31
#20 GE Infrastructure Technology Llc 30

About This Class

CPC subclass F05B belongs to class F05.

7,808 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 F05B 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 F05B assignees by class footprint. Bubble size = patents in F05B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 F05B assignees by class footprint. Bubble size = patents in F05B. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 81012141618 -20002004006008001000 Patents in F05B Avg claims / patent (company-wide) Vestas Wind Systems A…General ElectricSiemens Gamesa Renewa…Wobben PropertiesSiemens Aktiengesells…General Electric Reno…Beijing Goldwind Scie…Lm Wp Patent Holding…Lm Wind Power A/SLone Gull HoldingsSiemens Gamesa Renewa…Alstom RenewableBlade DynamicsNtn
Top 14 F05B assignees by class footprint. Bubble size = patents in F05B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class F05B?
CPC subclass F05B covers INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G. It belongs to CPC class F05 (INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04), with 7,808 US utility patents granted since 2015.
How many patents have been filed in F05B?
7,808 US utility patents were granted in CPC subclass F05B between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in F05B?
Vestas Wind Systems A/s leads F05B with 859 patents, making it the most active assignee in this technology area.
How is patent data for F05B 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., F05) is a broad technology category. Subclasses like F05B 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.