PlainPatent

CPC technology class · E04

E04G - Scaffolding

Scaffolding; forms; shuttering; building implements or aids, or their use; handling building materials on the site; repairing, breaking-up or other work on existing buildings. 2,717 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

2,717
US patents granted
E04
Parent CPC class
20
Active assignees
+54%
5-yr velocity

The verdict

Scaffolding ranks #336 of 670 CPC technology areas - 2,717 US patents granted since 2015, with filing up 54% over five years.

#336
of 670 CPC technology areas
2,717
US patents granted, 2015–2025
Max
leading assignee (91)
+54%
filing velocity, last 5 yrs
Top assignee: Max Co., Ltd. (91 patents)

CPC subclass E04G - SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS - covers 2,717 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 E04G is shaped by 20 distinct companies actively filing in this space. Max Co., Ltd. leads with 91 patents, followed by Putzmeister Engineering Gmbh at 48 grants and PERI SE at 41.

Filing activity in E04G is up 54% 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 E04G innovation accelerating?

US utility-patent grants per year in E04G, 2015–2025 - recent five years are up 54% versus 2015–2019.

150200250300350 20152016201720182019202020212022202320242025 216

Who leads E04G?

The 12 most active assignees in SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS - wider bars mean more grants

patents

What this shows Max is the most active filer in E04G, holding 91 of the 2,717 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 E04G
Rank Company Patents in E04G
#1 Max Co., Ltd. 91
#2 Putzmeister Engineering Gmbh 48
#3 PERI SE 41
#4 CFS Concrete Forming Systems Inc. 24
#5 Zipwall, Llc 24
#6 PERI Ag 23
#7 Fastbrick IP PTY Ltd 22
#8 DOKA Gmbh 20
#9 Apache Industrial Services, Inc. 19
#10 Werner Co. 18
#11 Schwing Gmbh 18
#12 ULMA C Y E, S. COOP. 17
#13 Paul Kristen, Inc. 16
#14 ICON Technology, Inc. 15
#15 Cetres Holdings, Llc 14
#16 Conxtech, Inc. 13
#17 Wilhelm Layher Verwaltungs-gmbh 13
#18 Reliance Worldwide Corporation 11
#19 Kone Corporation 10
#20 Sam Carbis Asset Management, Llc 10

About This Class

CPC subclass E04G belongs to class E04.

2,717 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 E04G 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 E04G assignees by class footprint. Bubble size = patents in E04G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 E04G assignees by class footprint. Bubble size = patents in E04G. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 020406080100 Patents in E04G Avg claims / patent (company-wide) MaxPutzmeister Engineeri…Peri SeCfs Concrete Forming…ZipwallPeriFastbrick Ip PtyDokaApache Industrial Ser…WernerSchwingUlma C Y E S CoopPaul KristenIcon Technology
Top 14 E04G assignees by class footprint. Bubble size = patents in E04G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class E04G?
CPC subclass E04G covers SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS. It belongs to CPC class E04 (BUILDING), with 2,717 US utility patents granted since 2015.
How many patents have been filed in E04G?
2,717 US utility patents were granted in CPC subclass E04G between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in E04G?
Max Co., Ltd. leads E04G with 91 patents, making it the most active assignee in this technology area.
How is patent data for E04G 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 E04G 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.