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CPC technology class · E02

E02D - Foundations

Foundations; excavations; embankments ; underground or underwater structures. 3,369 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

3,369
US patents granted
E02
Parent CPC class
20
Active assignees
+19%
5-yr velocity

The verdict

Foundations ranks #302 of 670 CPC technology areas - 3,369 US patents granted since 2015, with filing up 19% over five years.

#302
of 670 CPC technology areas
3,369
US patents granted, 2015–2025
Hamm
leading assignee (35)
+19%
filing velocity, last 5 yrs
Top assignee: Hamm Ag (35 patents)

CPC subclass E02D - FOUNDATIONS; EXCAVATIONS; EMBANKMENTS ; UNDERGROUND OR UNDERWATER STRUCTURES - covers 3,369 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class E02 (HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING). See our CPC classification guide for how the system works.

The competitive landscape in E02D is shaped by 20 distinct companies actively filing in this space. Hamm Ag leads with 35 patents, followed by OJJO, Inc. at 31 grants and Soletanche Freyssinet at 30.

Filing activity in E02D is up 19% over the past five years versus 2015-2019, a relatively steady filing pace. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is E02D innovation accelerating?

US utility-patent grants per year in E02D, 2015–2025 - recent five years are up 19% versus 2015–2019.

200250300350400 20152016201720182019202020212022202320242025 230

Who leads E02D?

The 12 most active assignees in FOUNDATIONS; EXCAVATIONS; EMBANKMENTS ; UNDERGROUND OR UNDERWATER STRUCTURES - wider bars mean more grants

patents

What this shows Hamm is the most active filer in E02D, holding 35 of the 3,369 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 E02D
Rank Company Patents in E02D
#1 Hamm Ag 35
#2 OJJO, Inc. 31
#3 Soletanche Freyssinet 30
#4 Geopier Foundation Company, Inc. 26
#5 Keystone Retaining Wall Systems, Llc 25
#6 Bauer Maschinen Gmbh 25
#7 Caterpillar Paving Products Inc. 24
#8 Bauer Spezialtiefbau Gmbh 24
#9 American Piledriving Equipment, Inc. 22
#10 IHC Holland IE B.v. 20
#11 Soilmec S.p.a. 19
#12 Bomag Gmbh 17
#13 Anchor Wall Systems, Inc. 16
#14 Tensar International Corporation 15
#15 LMK Technologies, Llc 14
#16 Shandong University 13
#17 Oldcastle Precast Inc. 13
#18 Wobben Properties Gmbh 12
#19 Liebherr-werk Nenzing Gmbh 12
#20 LES Materiaux DE Construction Oldcastle Canada, Inc 12

About This Class

CPC subclass E02D belongs to class E02.

3,369 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 E02D 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 E02D assignees by class footprint. Bubble size = patents in E02D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 E02D assignees by class footprint. Bubble size = patents in E02D. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 10152025303540 Patents in E02D Avg claims / patent (company-wide) HammOjjoSoletanche FreyssinetGeopier FoundationKeystone Retaining Wa…Bauer MaschinenCaterpillar Paving Pr…Bauer SpezialtiefbauAmerican Piledriving…Ihc Holland Ie B VSoilmec S P ABomagAnchor Wall SystemsTensar International
Top 14 E02D assignees by class footprint. Bubble size = patents in E02D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class E02D?
CPC subclass E02D covers FOUNDATIONS; EXCAVATIONS; EMBANKMENTS ; UNDERGROUND OR UNDERWATER STRUCTURES. It belongs to CPC class E02 (HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING), with 3,369 US utility patents granted since 2015.
How many patents have been filed in E02D?
3,369 US utility patents were granted in CPC subclass E02D between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in E02D?
Hamm Ag leads E02D with 35 patents, making it the most active assignee in this technology area.
How is patent data for E02D 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., E02) is a broad technology category. Subclasses like E02D 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.