CPC technology class · E06

E06B - Fixed Or Movable Closures For Openings In Buildings

Fixed or movable closures for openings in buildings, vehicles, fences or like enclosures in general, e.g. doors, windows, blinds, gates. 7,398 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

7,398
US patents granted: #1/2
in E06: 91.9%
E06 class share: +14%
5-yr velocity

The verdict

According to USPTO PatentsView, Fixed Or Movable Closures For Openings In Buildings ranks #201 of 670 CPC technology areas - 7,398 US patents granted since 2015, with recorded grant volume up 14% over five years.

#201
of 670 CPC technology areas: 7,398
US patents granted, 2015–2025: Hunter Douglas
leading assignee (261): +14%
grant velocity, last 5 yrs

How E06B's grant cadence moved

Between 2020–2024, E06B recorded 3,565 grants versus 3,130 in 2015–2019 (+14% equal-window velocity). Across complete years, output peaked in 2020 at 836 grants and bottomed in 2015 at 509 (+64% peak-over-trough). Lead assignee Hunter Douglas Inc. holds 3.5% of the class ; the top three share 8.6%.

Leaderboard read

E06B concentration, lead at 3.5%

Hunter Douglas Inc. leads this historical grant record at 3.5% of E06B - us corporation assignees hold 67% of class grants (3,035 of 4,555). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 3.5%
Top three share: 8.6%
Lead over #2: 31

Where E06B sits inside E06

Among 2 subclasses in E06 (Doors, Windows, Shutters, OR Roller Blinds IN GENERAL; Ladders), E06B ranks #1 and holds 91.9% of the parent class's 8,051 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

E06C 653

Rising assignees active in E06B

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 Beijing BOE Sensor Technology Co., Ltd. 27x 3 → 81 company-wide · 11 in E06B
#2 Clearvue Technologies Ltd 16x 0 → 16 company-wide · 5 in E06B
#3 Halio, Inc. 13x 2 → 25 company-wide · 14 in E06B
#4 Filobe Co., Ltd. 9.00x 0 → 9 company-wide · 10 in E06B
#5 National Guard Products, Inc. 9.00x 1 → 9 company-wide · 6 in E06B

E06B grants by year, peak 2020 (836)

US utility-patent grants per year in E06B, 2015–2025 - recent five years are up 14% versus 2015–2019.

Hunter Douglas

261
View

230
Lutron Technology

144
Saint-gobain Glass…

115
Masonite

107
Guardian Glass

106
Vkr Holding A/S

79
Nien Made Enterprise

70
Guardian Industries

61
Mechoshade Systems

61
Endura Products

57
Crestron

53

What this shows Hunter Douglas is the most active filer in E06B, holding 261 of the 7,398 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 E06B
Rank	Company	Patents in E06B
#1	Hunter Douglas Inc.	261
#2	View, Inc.	230
#3	Lutron Technology Company LLC	144
#4	Saint-gobain Glass France	115
#5	Masonite Corporation	107
#6	Guardian Glass, LLC	106
#7	VKR Holding A/S	79
#8	Nien Made Enterprise Co., Ltd.	70
#9	Guardian Industries Corp.	61
#10	Mechoshade Systems, LLC	61
#11	Endura Products, LLC	57
#12	Crestron Electronics, Inc.	53
#13	Carlson Pet Products, Inc.	50
#14	Lutron Electronics Co., Inc.	49
#15	Regalo International, LLC	49
#16	Andersen Corporation	48
#17	Pella Corporation	48
#18	Somfy Activites SA	41
#19	Cardinal IG Company	41
#20	Overhead Door Corporation	37

Footprint here vs. claim strategy

Each dot is a leading E06B 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 E06B assignees by class footprint. Bubble size = patents in E06B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near E06B's 7,398-grant footprint

Nationwide nearest neighbors for E06B (#201 of 670 by volume ; lead share 3.5%) - not the E06 parent-class siblings above.

Nearest by grant volume

F03D 7,370 F16J 7,442 B21D 7,309 G10K 7,488

Nearest by lead-assignee share

A61B 3.5% E05Y 3.5% C05D 3.5% C08J 3.5%

Questions about E06B

Which company holds the most patents in E06B?

Hunter Douglas Inc. leads E06B with 261 patents (3.5% of the subclass). By PatentsView assignee type, us corporations account for 67% of class grants.

Which E06B assignees grew fastest recently?

Among assignees with ≥5 grants in E06B, Beijing BOE Sensor Technology Co., Ltd. shows the highest company-wide grant multiple (27x: 3 grants in 2019–2021 → 81 in 2022–2024) while holding 11 patents in this subclass. Growth is company-wide, not class-only.

How does E06B compare inside parent class E06?

Inside E06 (Doors, Windows, Shutters, OR Roller Blinds IN GENERAL; Ladders), E06B ranks #1 of 2 subclasses by grant volume and holds 91.9% of the parent class total. The largest sibling is E06C (653 grants).

What to do with this data

E06B in context - here's where to go next.

Hunter Douglas Inc. leads E06B with 261 grants in this class. See full portfolio
E06B ranks #201 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class E06, the largest sibling subclass is E06C with 653 grants. Explore E06C

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

Methodology - E06B figures are USPTO PatentsView granted-utility totals for this subclass (7,398 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.