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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 filing trajectory.

3,714
US patents granted
B66
Parent CPC class
20
Active assignees
+29%
5-yr velocity

The verdict

Elevators ranks #287 of 670 CPC technology areas - 3,714 US patents granted since 2015, with filing up 29% over five years.

#287
of 670 CPC technology areas
3,714
US patents granted, 2015–2025
Otis Elevator
leading assignee (1,225)
+29%
filing velocity, last 5 yrs
Top assignee: OTIS Elevator Company (1,225 patents)

CPC subclass B66B - ELEVATORS; ESCALATORS OR MOVING WALKWAYS - covers 3,714 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 B66B is shaped by 20 distinct companies actively filing in this space. OTIS Elevator Company leads with 1,225 patents, followed by Kone Corporation at 590 grants and Inventio Ag at 475.

Filing activity in B66B is up 29% 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 B66B innovation accelerating?

US utility-patent grants per year in B66B, 2015–2025 - recent five years are up 29% versus 2015–2019.

150200250300350400450 20152016201720182019202020212022202320242025 225

Who leads B66B?

The 12 most active assignees in ELEVATORS; ESCALATORS OR MOVING WALKWAYS - wider bars mean more grants

patents

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.

Source USPTO PatentsView, granted utility patents As of 2015–2025 grant years
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

About This Class

CPC subclass B66B belongs to class B66.

3,714 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 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).

Top 14 B66B assignees by class footprint. Bubble size = patents in B66B. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 -500050010001500 Patents in B66B Avg claims / patent (company-wide) Otis ElevatorKoneInventiothyssenkrupp ElevatorthyssenkruppTk Elevator Innovatio…China University of M…Mitsubishi Electric R…FujitecCedesWittur HoldingStannah StairliftsToshiba ElevatorAlclear
Top 14 B66B assignees by class footprint. Bubble size = patents in B66B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class B66B?
CPC subclass B66B covers ELEVATORS; ESCALATORS OR MOVING WALKWAYS. It belongs to CPC class B66 (HOISTING; LIFTING; HAULING), with 3,714 US utility patents granted since 2015.
How many patents have been filed in B66B?
3,714 US utility patents were granted in CPC subclass B66B between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in B66B?
OTIS Elevator Company leads B66B with 1,225 patents, making it the most active assignee in this technology area.
How is patent data for B66B 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 B66B 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.