PlainPatent

CPC technology class · B66

B66D - Capstans

Capstans; winches; tackles, e.g. pulley blocks; hoists. 1,354 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

1,354
US patents granted
B66
Parent CPC class
20
Active assignees
+26%
5-yr velocity

The verdict

Capstans ranks #417 of 670 CPC technology areas - 1,354 US patents granted since 2015, with filing up 26% over five years.

#417
of 670 CPC technology areas
1,354
US patents granted, 2015–2025
Konecranes Global
leading assignee (38)
+26%
filing velocity, last 5 yrs
Top assignee: Konecranes Global Corporation (38 patents)

CPC subclass B66D - CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS - covers 1,354 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class B66 (HOISTING; LIFTING; HAULING). See our CPC classification guide for how the system works.

The competitive landscape in B66D is shaped by 20 distinct companies actively filing in this space. Konecranes Global Corporation leads with 38 patents, followed by Warn Industries, Inc. at 33 grants and Hall Labs Llc at 32.

Filing activity in B66D is up 26% 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 B66D innovation accelerating?

US utility-patent grants per year in B66D, 2015–2025 - recent five years are up 26% versus 2015–2019.

6080100120140160180 20152016201720182019202020212022202320242025 83

Who leads B66D?

The 12 most active assignees in CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS - wider bars mean more grants

patents

What this shows Konecranes Global is the most active filer in B66D, holding 38 of the 1,354 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 B66D
Rank Company Patents in B66D
#1 Konecranes Global Corporation 38
#2 Warn Industries, Inc. 33
#3 Hall Labs Llc 32
#4 OTIS Elevator Company 26
#5 KITO Corporation 26
#6 Liebherr-components Biberach Gmbh 24
#7 Kone Corporation 23
#8 Electronic Theatre Controls, Inc. 19
#9 Wing Aviation Llc 18
#10 TT Technologies, Inc. 18
#11 Workhorse Group Inc. 18
#12 Kobelco Construction Machinery Co., Ltd 14
#13 National Oilwell Varco Norway AS 12
#14 Comeup Industries Inc. 12
#15 Ramsey Winch Company 10
#16 Itrec B.v. 8
#17 Zedel 7
#18 Taiyuan University OF Technology 7
#19 Manitowoc Crane Group France 7
#20 T-MAX (hangzhou) Technology, Co., Ltd. 7

About This Class

CPC subclass B66D belongs to class B66.

1,354 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 B66D 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 B66D assignees by class footprint. Bubble size = patents in B66D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 B66D assignees by class footprint. Bubble size = patents in B66D. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 05101520 10203040 Patents in B66D Avg claims / patent (company-wide) Konecranes GlobalWarn IndustriesHall LabsOtis ElevatorKitoLiebherr-components B…KoneTheatre ControlsWing AviationTtWorkhorse GroupKobelco Construction…National Oilwell Varc…Comeup Industries
Top 14 B66D assignees by class footprint. Bubble size = patents in B66D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class B66D?
CPC subclass B66D covers CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS. It belongs to CPC class B66 (HOISTING; LIFTING; HAULING), with 1,354 US utility patents granted since 2015.
How many patents have been filed in B66D?
1,354 US utility patents were granted in CPC subclass B66D between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in B66D?
Konecranes Global Corporation leads B66D with 38 patents, making it the most active assignee in this technology area.
How is patent data for B66D 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., B66) is a broad technology category. Subclasses like B66D 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.