PlainPatent

CPC technology class · E05

E05B - Locks

Locks; accessories therefor; handcuffs. 9,176 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

9,176
US patents granted
E05
Parent CPC class
20
Active assignees
+42%
5-yr velocity

The verdict

Locks ranks #177 of 670 CPC technology areas - 9,176 US patents granted since 2015, with filing up 42% over five years.

#177
of 670 CPC technology areas
9,176
US patents granted, 2015–2025
Schlage Lock
leading assignee (337)
+42%
filing velocity, last 5 yrs
Top assignee: Schlage Lock Company Llc (337 patents)

CPC subclass E05B - LOCKS; ACCESSORIES THEREFOR; HANDCUFFS - covers 9,176 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 E05B is shaped by 20 distinct companies actively filing in this space. Schlage Lock Company Llc leads with 337 patents, followed by Kiekert Ag at 293 grants and Mitsui Kinzoku ACT Corporation at 109.

Filing activity in E05B is up 42% 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 E05B innovation accelerating?

US utility-patent grants per year in E05B, 2015–2025 - recent five years are up 42% versus 2015–2019.

5006007008009001,000 20152016201720182019202020212022202320242025 738

Who leads E05B?

The 12 most active assignees in LOCKS; ACCESSORIES THEREFOR; HANDCUFFS - wider bars mean more grants

patents

What this shows Schlage Lock is the most active filer in E05B, holding 337 of the 9,176 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 E05B
Rank Company Patents in E05B
#1 Schlage Lock Company Llc 337
#2 Kiekert Ag 293
#3 Mitsui Kinzoku ACT Corporation 109
#4 Magna Closures Inc. 108
#5 Huf Hülsbeck & Fürst Gmbh & Co. KG 98
#6 Illinois TOOL Works Inc. 97
#7 Aisin Seiki Kabushiki Kaisha 95
#8 Inteva Products, Llc 83
#9 Invue Security Products Inc. 64
#10 Spectrum Brands, Inc. 63
#11 Hanchett Entry Systems, Inc. 60
#12 Sargent Manufacturing Company 60
#13 ABUS August Bremicker Söhne KG 54
#14 August Home, Inc. 52
#15 Magna Mirrors Of America, Inc. 46
#16 Alpha Corporation 45
#17 Kabushiki Kaisha Honda Lock 42
#18 Sensormatic Electronics, Llc 40
#19 U-shin Italia S.p.a 39
#20 ACCO Brands Corporation 37

About This Class

CPC subclass E05B belongs to class E05.

9,176 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 E05B 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 E05B assignees by class footprint. Bubble size = patents in E05B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 E05B assignees by class footprint. Bubble size = patents in E05B. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 51015202530 0100200300400 Patents in E05B Avg claims / patent (company-wide) Schlage LockKiekertMitsui Kinzoku ActMagna ClosuresHuf Hülsbeck & Fürst…Illinois Tool WorksAisin SeikiInteva ProductsInvue Security Produc…Spectrum BrandsHanchett Entry SystemsSargent ManufacturingAbus August Bremicker…August Home
Top 14 E05B assignees by class footprint. Bubble size = patents in E05B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class E05B?
CPC subclass E05B covers LOCKS; ACCESSORIES THEREFOR; HANDCUFFS. It belongs to CPC class E05 (LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES), with 9,176 US utility patents granted since 2015.
How many patents have been filed in E05B?
9,176 US utility patents were granted in CPC subclass E05B between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in E05B?
Schlage Lock Company Llc leads E05B with 337 patents, making it the most active assignee in this technology area.
How is patent data for E05B 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 E05B 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.