PlainPatent

CPC technology class · E02

E02C - Ship-lifting Devices OR Mechanisms

Ship-lifting devices or mechanisms. 11 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

11
US patents granted
E02
Parent CPC class
5
Active assignees
+150%
5-yr velocity

The verdict

Ship-lifting Devices OR Mechanisms ranks #658 of 670 CPC technology areas - 11 US patents granted since 2015, with filing up 150% over five years.

#658
of 670 CPC technology areas
11
US patents granted, 2015–2025
China Institute of Wa…
leading assignee (1)
+150%
filing velocity, last 5 yrs
Top assignee: China Institute Of Water Resources And Hydropower Research (1 patents)

CPC subclass E02C - SHIP-LIFTING DEVICES OR MECHANISMS - covers 11 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 E02C is shaped by 5 distinct companies actively filing in this space. China Institute Of Water Resources And Hydropower Research leads with 1 patents, followed by Bardex Corporation at 1 grants and Shanghai Maritime University at 1.

Filing activity in E02C is up 150% 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 E02C innovation accelerating?

US utility-patent grants per year in E02C, 2015–2025 - recent five years are up 150% versus 2015–2019.

0.511.522.5 201520172020202120222024 1

Who leads E02C?

The 12 most active assignees in SHIP-LIFTING DEVICES OR MECHANISMS - wider bars mean more grants

patents

What this shows China Institute of Wa… is the most active filer in E02C, holding 1 of the 11 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 E02C
Rank Company Patents in E02C
#1 Nanjing Hydraulic Research Institute 1
#2 Bardex Corporation 1
#3 Shanghai Maritime University 1
#4 Waterbox OY 1
#5 U.s. Geological Survey 1

About This Class

CPC subclass E02C belongs to class E02.

11 patents were granted in this class between 2015 and 2025.

5 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 E02C 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 5 E02C assignees by class footprint. Bubble size = patents in E02C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 5 E02C assignees by class footprint. Bubble size = patents in E02C. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 5 data points (bubble-sized by third dimension). 51015202530 0.90.911.1 Patents in E02C Avg claims / patent (company-wide) Nanjing Hydraulic Res…BardexShanghai Maritime Uni…Waterbox OyU S Geological Survey
Top 5 E02C assignees by class footprint. Bubble size = patents in E02C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class E02C?
CPC subclass E02C covers SHIP-LIFTING DEVICES OR MECHANISMS. It belongs to CPC class E02 (HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING), with 11 US utility patents granted since 2015.
How many patents have been filed in E02C?
11 US utility patents were granted in CPC subclass E02C between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in E02C?
China Institute Of Water Resources And Hydropower Research leads E02C with 1 patents, making it the most active assignee in this technology area.
How is patent data for E02C 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 E02C 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.