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 grant trajectory.

Compiled by PlainPatent · May 15, 2026

1,354
US patents granted: #4/4
in B66: 10.6%
B66 class share: +12%
5-yr velocity

The verdict

According to USPTO PatentsView, Capstans ranks #417 of 670 CPC technology areas - 1,354 US patents granted since 2015, with recorded grant volume up 12% over five years.

#417
of 670 CPC technology areas: 1,354
US patents granted, 2015–2025: Konecranes Global
leading assignee (38): +12%
grant velocity, last 5 yrs

How B66D's grant cadence moved

Between 2020–2024, B66D recorded 654 grants versus 586 in 2015–2019 (+12% equal-window velocity). Across complete years, output peaked in 2020 at 170 grants and bottomed in 2015 at 87 (+95% peak-over-trough). Lead assignee Konecranes Global Corporation holds 2.8% of the class ; the top three share 7.6%.

Leaderboard read

B66D concentration, lead at 2.8%

Konecranes Global Corporation leads this historical grant record at 2.8% of B66D - foreign corporation assignees hold 52% of class grants (373 of 711). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 2.8%
Top three share: 7.6%
Lead over #2: 5

Where B66D sits inside B66

Among 4 subclasses in B66 (HOISTING; LIFTING; Hauling), B66D ranks #4 and holds 10.6% of the parent class's 12,745 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

B66F 4,001 B66B 3,714 B66C 3,676

Rising assignees active in B66D

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 Workhorse Group Inc. 26x 2 → 52 company-wide · 18 in B66D
#2 Taiyuan University OF Technology 2.40x 30 → 72 company-wide · 7 in B66D
#3 Caterpillar Global Mining LLC 1.89x 9 → 17 company-wide · 5 in B66D
#4 T-max (HANGZHOU) Technology, Co., Ltd. 1.73x 11 → 19 company-wide · 7 in B66D
#5 Manitowoc Crane Group France 1.64x 14 → 23 company-wide · 7 in B66D

B66D grants by year, peak 2020 (170)

US utility-patent grants per year in B66D, 2015–2025 - recent five years are up 12% versus 2015–2019.

Konecranes Global

38
Warn Industries

33
Hall Labs

32
Otis Elevator

26
Kito

26
Liebherr-components…

24
Kone

23
Theatre Controls

19
Wing Aviation

18
Tt

18
Workhorse Group

18
Kobelco Construction…

14

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.

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

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).

Classes near B66D's 1,354-grant footprint

Nationwide nearest neighbors for B66D (#417 of 670 by volume ; lead share 2.8%) - not the B66 parent-class siblings above.

Nearest by grant volume

A22C 1,343 E03F 1,375 B27B 1,327 F21L 1,327

Nearest by lead-assignee share

B65G 2.8% A61F 2.8% G07B 2.8% C23F 2.8%

Questions about B66D

Which company holds the most patents in B66D?

Konecranes Global Corporation leads B66D with 38 patents (2.8% of the subclass). By PatentsView assignee type, foreign corporations account for 52% of class grants.

Which B66D assignees grew fastest recently?

Among assignees with ≥5 grants in B66D, Workhorse Group Inc. shows the highest company-wide grant multiple (26x: 2 grants in 2019–2021 → 52 in 2022–2024) while holding 18 patents in this subclass. Growth is company-wide, not class-only.

How does B66D compare inside parent class B66?

Inside B66 (HOISTING; LIFTING; Hauling), B66D ranks #4 of 4 subclasses by grant volume and holds 10.6% of the parent class total. The largest sibling is B66F (4,001 grants).

What to do with this data

B66D in context - here's where to go next.

Konecranes Global Corporation leads B66D with 38 grants in this class. See full portfolio
B66D ranks #417 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class B66, the largest sibling subclass is B66F with 4,001 grants. Explore B66F

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

Methodology - B66D figures are USPTO PatentsView granted-utility totals for this subclass (1,354 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.