CPC technology class · B66

B66B - Elevators

Elevators; escalators or moving walkways. 3,714 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

3,714
US patents granted: #2/4
in B66: 29.1%
B66 class share: +15%
5-yr velocity

The verdict

According to USPTO PatentsView, Elevators ranks #287 of 670 CPC technology areas - 3,714 US patents granted since 2015, with recorded grant volume up 15% over five years.

#287
of 670 CPC technology areas: 3,714
US patents granted, 2015–2025: Otis Elevator
leading assignee (1,225): +15%
grant velocity, last 5 yrs

How tightly B66B concentrates

Otis Elevator Company holds 33.0% of B66B's recorded grants (1,225 of 3,714) - 635 more than Kone Corporation. Across complete PatentsView years, the class peaked in 2019 at 418 grants and bottomed in 2015 at 209 (+100% peak-over-trough). Equal-window velocity 2020–2024 vs 2015–2019: +15% (1,812 vs 1,575 grants).

Leaderboard read

B66B concentration, lead at 33.0%

Otis Elevator Company leads this historical grant record at 33.0% of B66B - us corporation assignees hold 51% of class grants (1,473 of 2,891). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 33.0%
Top three share: 61.7%
Lead over #2: 635

Where B66B sits inside B66

Among 4 subclasses in B66 (HOISTING; LIFTING; Hauling), B66B ranks #2 and holds 29.1% 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 B66C 3,676 B66D 1,354

Rising assignees active in B66B

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 Fujitec Co., Ltd. 14x 1 → 14 company-wide · 20 in B66B
#2 Suzhou Lekin Semiconductor Co., Ltd. 5.46x 13 → 71 company-wide · 5 in B66B
#3 Beltways Inc. 5.00x 0 → 5 company-wide · 8 in B66B
#4 G.A.L. Manufacturing Company, LLC 5.00x 1 → 5 company-wide · 7 in B66B
#5 TK Home Solutions B.V. 3.50x 2 → 7 company-wide · 11 in B66B

B66B grants by year, peak 2019 (418)

US utility-patent grants per year in B66B, 2015–2025 - recent five years are up 15% versus 2015–2019.

Otis Elevator

1,225
Kone

590
Inventio

475
thyssenkrupp Elevator

75
thyssenkrupp

39
Tk Elevator Innovation…

32
China University of…

31
Mitsubishi Electric…

26
Fujitec

20
Cedes

17
Wittur Holding

17
Stannah Stairlifts

15

What this shows Otis Elevator is the most active filer in B66B, holding 1,225 of the 3,714 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 B66B
Rank	Company	Patents in B66B
#1	Otis Elevator Company	1,225
#2	Kone Corporation	590
#3	Inventio AG	475
#4	thyssenkrupp Elevator Corporation	75
#5	thyssenkrupp AG	39
#6	TK Elevator Innovation and Operations GmbH	32
#7	China University of Mining and Technology	31
#8	Mitsubishi Electric Research Laboratories, Inc.	26
#9	Fujitec Co., Ltd.	20
#10	Cedes AG	17
#11	Wittur Holding GMBH	17
#12	Stannah Stairlifts Limited	15
#13	Toshiba Elevator Kabushiki Kaisha	13
#14	Alclear, LLC	11
#15	TK Home Solutions B.V.	11
#16	SafeWorks, LLC	10
#17	Dongnan Elevator Co., Ltd.	10
#18	ThyssenKrupp Elevator Innovation Center S.A.	9
#19	Bekaert Advanced Cords Aalter NV	8
#20	Xuzhou Coal Mine Safety Equipment Manufacture Co., Ltd.	8

Footprint here vs. claim strategy

Each dot is a leading B66B 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 B66B assignees by class footprint. Bubble size = patents in B66B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near B66B's 3,714-grant footprint

Nationwide nearest neighbors for B66B (#287 of 670 by volume ; lead share 33.0%) - not the B66 parent-class siblings above.

Nearest by grant volume

B62M 3,735 C08B 3,742 F42B 3,745 B66C 3,676

Nearest by lead-assignee share

B62L 33.0% A01F 30.5% G03G 29.1% F23R 26.3%

Questions about B66B

Which company holds the most patents in B66B?

Otis Elevator Company leads B66B with 1,225 patents (33.0% of the subclass). By PatentsView assignee type, us corporations account for 51% of class grants.

Which B66B assignees grew fastest recently?

Among assignees with ≥5 grants in B66B, Fujitec Co., Ltd. shows the highest company-wide grant multiple (14x: 1 grants in 2019–2021 → 14 in 2022–2024) while holding 20 patents in this subclass. Growth is company-wide, not class-only.

How does B66B compare inside parent class B66?

Inside B66 (HOISTING; LIFTING; Hauling), B66B ranks #2 of 4 subclasses by grant volume and holds 29.1% of the parent class total. The largest sibling is B66F (4,001 grants).

What to do with this data

B66B in context - here's where to go next.

Otis Elevator Company leads B66B with 1,225 grants in this class. See full portfolio
B66B ranks #287 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 - B66B figures are USPTO PatentsView granted-utility totals for this subclass (3,714 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.