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 grant trajectory.
- 3,369
- US patents granted
- #2/4
- in E02
- 25.8%
- E02 class share
- +3%
- 5-yr velocity
The verdict
According to USPTO PatentsView, Foundations ranks #302 of 670 CPC technology areas - 3,369 US patents granted since 2015, with recorded grant volume up 3% over five years.
- #302
- of 670 CPC technology areas
- 3,369
- US patents granted, 2015–2025
- Hamm
- leading assignee (35)
- +3%
- grant velocity, last 5 yrs
How E02D's grant cadence moved
Between 2020–2024, E02D recorded 1,505 grants versus 1,461 in 2015–2019 (+3% equal-window velocity). Across complete years, output peaked in 2019 at 373 grants and bottomed in 2015 at 246 (+52% peak-over-trough). Lead assignee Hamm AG holds 1.0% of the class ; the top three share 2.8%.
Leaderboard read
E02D concentration, lead at 1.0%
Hamm AG leads this historical grant record at 1.0% of E02D - us corporation assignees hold 55% of class grants (896 of 1,624). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.
- Leader's share
- 1.0%
- Top three share
- 2.8%
- Lead over #2
- 4
35 of 3,369 grants
of the class's recorded grants
more grants than Ojjo, Inc.
Where E02D sits inside E02
Among 4 subclasses in E02 (Hydraulic ENGINEERING; FOUNDATIONS; Soil Shifting), E02D ranks #2 and holds 25.8% of the parent class's 13,033 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.
Rising assignees active in E02D
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 Iqip Holding B.V. 8.00x 0 → 8 company-wide · 6 in E02D
- #2 Independence Materials Group, LLC 7.00x 2 → 14 company-wide · 8 in E02D
- #3 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences 6.25x 4 → 25 company-wide · 6 in E02D
- #4 Wilkinson Ecological Design 6.00x 0 → 6 company-wide · 8 in E02D
- #5 Forma Technologies Inc. 5.00x 0 → 5 company-wide · 6 in E02D
E02D grants by year, peak 2019 (373)
US utility-patent grants per year in E02D, 2015–2025 - recent five years are up 3% versus 2015–2019.
Who leads E02D?
The 12 most active assignees in FOUNDATIONS; EXCAVATIONS; Embankments ; Underground OR Underwater Structures - wider bars mean more grants
- Hamm
Hamm AG
35 patents
- Ojjo
Ojjo, Inc.
31 patents
- Soletanche Freyssinet
Soletanche Freyssinet
30 patents
- Geopier Foundation
Geopier Foundation Company, Inc.
26 patents
- Keystone Retaining…
Keystone Retaining Wall Systems, LLC
25 patents
- Bauer Maschinen
Bauer Maschinen GmbH
25 patents
- Caterpillar Paving…
Caterpillar Paving Products Inc.
24 patents
- Bauer Spezialtiefbau
Bauer Spezialtiefbau GmbH
24 patents
- American Piledriving…
American Piledriving Equipment, Inc.
22 patents
- Ihc Holland Ie B V
IHC Holland IE B.V.
20 patents
- Soilmec S P A
Soilmec S.P.A.
19 patents
- Bomag
Bomag GmbH
17 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.
View data table
| 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 |
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.
Classes near E02D's 3,369-grant footprint
Nationwide nearest neighbors for E02D (#302 of 670 by volume ; lead share 1.0%) - not the E02 parent-class siblings above.
Nearest by grant volume
Questions about E02D
Which company holds the most patents in E02D?
Which E02D assignees grew fastest recently?
How does E02D compare inside parent class E02?
What to do with this data
E02D in context - here's where to go next.
- Hamm AG leads E02D with 35 grants in this class. See full portfolio
- E02D ranks #302 of 670 by grant volume among all tracked CPC technology areas. See the ranking
- Inside parent class E02, the largest sibling subclass is E02F with 7,816 grants. Explore E02F
Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.
Methodology - E02D figures are USPTO PatentsView granted-utility totals for this subclass (3,369 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.