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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 grant trajectory.

2,717
US patents granted
#5/6
in E04
9.6%
E04 class share
+33%
5-yr velocity

The verdict

According to USPTO PatentsView, Scaffolding ranks #336 of 670 CPC technology areas - 2,717 US patents granted since 2015, with recorded grant volume up 33% over five years.

#336
of 670 CPC technology areas
2,717
US patents granted, 2015–2025
Max
leading assignee (91)
+33%
grant velocity, last 5 yrs

How E04G's grant cadence moved

Between 2020–2024, E04G recorded 1,387 grants versus 1,043 in 2015–2019 (+33% equal-window velocity). Across complete years, output peaked in 2024 at 329 grants and bottomed in 2015 at 168 (+96% peak-over-trough). Lead assignee Max Co., Ltd. holds 3.3% of the class ; the top three share 6.6%.

Leaderboard read

E04G concentration, lead at 3.3%

Max Co., Ltd. leads this historical grant record at 3.3% of E04G - us corporation assignees hold 52% of class grants (666 of 1,271). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
3.3%

91 of 2,717 grants

Top three share
6.6%

of the class's recorded grants

Lead over #2
43

more grants than Putzmeister Engineering GmbH

Where E04G sits inside E04

Among 6 subclasses in E04 (Building), E04G ranks #5 and holds 9.6% of the parent class's 28,319 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

E04B 7,959 E04H 6,263 E04F 5,179 E04C 3,792 E04D 2,409

Rising assignees active in E04G

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. #1 Peri SE 35x 0 → 35 company-wide · 41 in E04G
  2. #2 CCS Contractor Equipment &SupplyLLC 8.00x 1 → 8 company-wide · 6 in E04G
  3. #3 Hanwha Corporation 6.25x 4 → 25 company-wide · 5 in E04G
  4. #4 Sayfa R&D PTY Ltd 6.00x 2 → 12 company-wide · 6 in E04G
  5. #5 Forma Technologies Inc. 5.00x 0 → 5 company-wide · 6 in E04G

E04G grants by year, peak 2024 (329)

US utility-patent grants per year in E04G, 2015–2025 - recent five years are up 33% 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

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). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 020406080100 Patents in E04G Avg claims / patent (company-wide) MaxPutzmeister Engineerin…Peri SeCfs Concrete Forming…ZipwallPeriFastbrick Ip PtyDokaApache Industrial…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).

Classes near E04G's 2,717-grant footprint

Nationwide nearest neighbors for E04G (#336 of 670 by volume ; lead share 3.3%) - not the E04 parent-class siblings above.

Nearest by grant volume

F41H 2,723 G03H 2,738 F27D 2,695 F02F 2,743

Nearest by lead-assignee share

F02G 3.3% D03D 3.3% C10L 3.4% B29C 3.4%

Questions about E04G

Which company holds the most patents in E04G?
Max Co., Ltd. leads E04G with 91 patents (3.3% of the subclass). By PatentsView assignee type, us corporations account for 52% of class grants.
Which E04G assignees grew fastest recently?
Among assignees with ≥5 grants in E04G, Peri SE shows the highest company-wide grant multiple (35x: 0 grants in 2019–2021 → 35 in 2022–2024) while holding 41 patents in this subclass. Growth is company-wide, not class-only.
How does E04G compare inside parent class E04?
Inside E04 (Building), E04G ranks #5 of 6 subclasses by grant volume and holds 9.6% of the parent class total. The largest sibling is E04B (7,959 grants).

What to do with this data

E04G in context - here's where to go next.

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

Methodology - E04G figures are USPTO PatentsView granted-utility totals for this subclass (2,717 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.