PlainPatent

CPC technology class · E04

E04D - ROOF Coverings

Roof coverings; sky-lights; gutters; roof-working tools. 2,409 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

2,409
US patents granted
E04
Parent CPC class
20
Active assignees
+26%
5-yr velocity

The verdict

ROOF Coverings ranks #350 of 670 CPC technology areas - 2,409 US patents granted since 2015, with filing up 26% over five years.

#350
of 670 CPC technology areas
2,409
US patents granted, 2015–2025
Bmic
leading assignee (149)
+26%
filing velocity, last 5 yrs
Top assignee: BMIC Llc (149 patents)

CPC subclass E04D - ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS - covers 2,409 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class E04 (BUILDING). See our CPC classification guide for how the system works.

The competitive landscape in E04D is shaped by 20 distinct companies actively filing in this space. BMIC Llc leads with 149 patents, followed by Certainteed Llc at 145 grants and Owens Corning Intellectual Capital, Llc at 108.

Filing activity in E04D is up 26% 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 E04D innovation accelerating?

US utility-patent grants per year in E04D, 2015–2025 - recent five years are up 26% versus 2015–2019.

180200220240260280 20152016201720182019202020212022202320242025 192

Who leads E04D?

The 12 most active assignees in ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS - wider bars mean more grants

patents

What this shows Bmic is the most active filer in E04D, holding 149 of the 2,409 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 E04D
Rank Company Patents in E04D
#1 BMIC Llc 149
#2 Certainteed Llc 145
#3 Owens Corning Intellectual Capital, Llc 108
#4 VKR Holding A/s 66
#5 Building Materials Investment Corporation 65
#6 Firestone Building Products Company, Llc 61
#7 Johns Manville 51
#8 Gutterglove, Inc. 40
#9 GAF Energy Llc 38
#10 SIKA Technology Ag 26
#11 Holcim Technology Ltd 25
#12 Leaffilter North, Llc 19
#13 Tamko Building Products Llc 19
#14 Solarcity Corporation 17
#15 RMH TECH Llc 17
#16 Roofers' Advantage Products, Llc 16
#17 Unirac, Inc. 15
#18 Huber Engineered Woods Llc 15
#19 Metal-era, Inc. 14
#20 Carlisle Construction Materials, Llc 13

About This Class

CPC subclass E04D belongs to class E04.

2,409 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 E04D 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 E04D assignees by class footprint. Bubble size = patents in E04D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 E04D assignees by class footprint. Bubble size = patents in E04D. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 8101214161820 050100150200 Patents in E04D Avg claims / patent (company-wide) BmicCertainteedOwens Corning Intelle…Vkr Holding A/SBuilding Materials In…Firestone Building Pr…Johns ManvilleGuttergloveGaf EnergySika TechnologyHolcim TechnologyLeaffilter NorthTamko Building Produc…Solarcity
Top 14 E04D assignees by class footprint. Bubble size = patents in E04D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class E04D?
CPC subclass E04D covers ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS. It belongs to CPC class E04 (BUILDING), with 2,409 US utility patents granted since 2015.
How many patents have been filed in E04D?
2,409 US utility patents were granted in CPC subclass E04D between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in E04D?
BMIC Llc leads E04D with 149 patents, making it the most active assignee in this technology area.
How is patent data for E04D 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., E04) is a broad technology category. Subclasses like E04D 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.