PlainPatent

CPC technology class · E04

E04F - Finishing WORK ON Buildings

Finishing work on buildings, e.g. stairs, floors. 5,179 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

5,179
US patents granted
E04
Parent CPC class
20
Active assignees
+31%
5-yr velocity

The verdict

Finishing WORK ON Buildings ranks #250 of 670 CPC technology areas - 5,179 US patents granted since 2015, with filing up 31% over five years.

#250
of 670 CPC technology areas
5,179
US patents granted, 2015–2025
Flooring Industies Sa…
leading assignee (212)
+31%
filing velocity, last 5 yrs
Top assignee: Flooring Industies Limited, SARL (212 patents)

CPC subclass E04F - FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS - covers 5,179 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 E04F is shaped by 20 distinct companies actively filing in this space. Flooring Industies Limited, SARL leads with 212 patents, followed by Valinge Innovation AB at 190 grants and Ceraloc Innovation AB at 94.

Filing activity in E04F is up 31% 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 E04F innovation accelerating?

US utility-patent grants per year in E04F, 2015–2025 - recent five years are up 31% versus 2015–2019.

350400450500550 20152016201720182019202020212022202320242025 399

Who leads E04F?

The 12 most active assignees in FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS - wider bars mean more grants

patents

What this shows Flooring Industies Sa… is the most active filer in E04F, holding 212 of the 5,179 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 E04F
Rank Company Patents in E04F
#1 Flooring Industies Limited, SARL 212
#2 Valinge Innovation AB 190
#3 Ceraloc Innovation AB 94
#4 Unilin BV 85
#5 Certainteed Llc 69
#6 I4f Licensing Nv 66
#7 Välinge Innovation AB 57
#8 United States Gypsum Company 45
#9 Champion Link International Corporation 37
#10 Pergo (europe) AB 34
#11 James Hardie Technology Limited 31
#12 Unilin BVBA 31
#13 Akzenta Paneele + Profile Gmbh 29
#14 Columbia Insurance Company 28
#15 Progress Profiles SPA 28
#16 Owens Corning Intellectual Capital, Llc 25
#17 Schluter Systems L.p. 24
#18 Advanced Architectural Products, Llc 24
#19 XYLO Technologies Ag 24
#20 Fortress Iron, Lp 23

About This Class

CPC subclass E04F belongs to class E04.

5,179 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 E04F 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 E04F assignees by class footprint. Bubble size = patents in E04F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 E04F assignees by class footprint. Bubble size = patents in E04F. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 050100150200250 Patents in E04F Avg claims / patent (company-wide) Flooring Industies Sa…Valinge Innovation AbCeraloc Innovation AbUnilin BvCertainteedi4f LicensingVÄLinge Innovation AbUnited States GypsumChampion Link Interna…Pergo (Europe) AbJames Hardie Technolo…Unilin BvbaAkzenta Paneele + Pro…Columbia Insurance
Top 14 E04F assignees by class footprint. Bubble size = patents in E04F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class E04F?
CPC subclass E04F covers FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS. It belongs to CPC class E04 (BUILDING), with 5,179 US utility patents granted since 2015.
How many patents have been filed in E04F?
5,179 US utility patents were granted in CPC subclass E04F between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in E04F?
Flooring Industies Limited, SARL leads E04F with 212 patents, making it the most active assignee in this technology area.
How is patent data for E04F 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 E04F 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.