PlainPatent

CPC technology class · E05

E05D - Hinges OR Suspension Devices FOR Doors

Hinges or suspension devices for doors, windows or wings. 4,538 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

4,538
US patents granted
E05
Parent CPC class
20
Active assignees
+21%
5-yr velocity

The verdict

Hinges OR Suspension Devices FOR Doors ranks #257 of 670 CPC technology areas - 4,538 US patents granted since 2015, with filing up 21% over five years.

#257
of 670 CPC technology areas
4,538
US patents granted, 2015–2025
Samsung
leading assignee (130)
+21%
filing velocity, last 5 yrs
Top assignee: Samsung Electronics Co., Ltd. (130 patents)

CPC subclass E05D - HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS - covers 4,538 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class E05 (LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES). See our CPC classification guide for how the system works.

The competitive landscape in E05D is shaped by 20 distinct companies actively filing in this space. Samsung Electronics Co., Ltd. leads with 130 patents, followed by Z124 at 82 grants and Whirlpool Corporation at 65.

Filing activity in E05D is up 21% 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 E05D innovation accelerating?

US utility-patent grants per year in E05D, 2015–2025 - recent five years are up 21% versus 2015–2019.

250300350400450500 20152016201720182019202020212022202320242025 285

Who leads E05D?

The 12 most active assignees in HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS - wider bars mean more grants

patents

What this shows Samsung is the most active filer in E05D, holding 130 of the 4,538 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 E05D
Rank Company Patents in E05D
#1 Julius BLUM Gmbh 107
#2 Z124 82
#3 Whirlpool Corporation 65
#4 Fositek Corporation 46
#5 Compal Electronics, Inc. 39
#6 ACER Incorporated 31
#7 Sugatsune Kogyo Co., Ltd. 30
#8 First Dome Corporation 30
#9 Assa Abloy Entrance Systems AB 26
#10 Caldwell Manufacturing Company North America, Llc 26
#11 BSH Hausgeräte Gmbh 25
#12 Overhead Door Corporation 25
#13 Hettich-oni Gmbh & Co. KG 24
#14 Qingdao Haier Joint Stock Co., Ltd. 22
#15 Amesbury Group, Inc. 21
#16 Won-door Corporation 21
#17 Lenovo (beijing) Limited 20
#18 Samet Kalip Ve Madeni Esya San Ve Tic. A.s. 20
#19 Arturo Salice S.p.a. 18
#20 Simonswerk Gmbh 16

About This Class

CPC subclass E05D belongs to class E05.

4,538 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 E05D 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 E05D assignees by class footprint. Bubble size = patents in E05D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 E05D assignees by class footprint. Bubble size = patents in E05D. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 0510152025 020406080100120 Patents in E05D Avg claims / patent (company-wide) Julius BlumZ124WhirlpoolFositekCompalAcer IncorporatedSugatsune KogyoFirst DomeAssa Abloy Entrance S…Caldwell Manufacturin…Bsh HausgeräteOverhead DoorHettich-oni & KgQingdao Haier Joint S…
Top 14 E05D assignees by class footprint. Bubble size = patents in E05D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class E05D?
CPC subclass E05D covers HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS. It belongs to CPC class E05 (LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES), with 4,538 US utility patents granted since 2015.
How many patents have been filed in E05D?
4,538 US utility patents were granted in CPC subclass E05D between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in E05D?
Samsung Electronics Co., Ltd. leads E05D with 130 patents, making it the most active assignee in this technology area.
How is patent data for E05D 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., E05) is a broad technology category. Subclasses like E05D 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.