PlainPatent

CPC technology class · E04

E04H - Buildings OR LIKE Structures FOR Particular Purposes

Buildings or like structures for particular purposes; swimming or splash baths or pools; masts; fencing; tents or canopies, in general. 6,263 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

6,263
US patents granted
E04
Parent CPC class
20
Active assignees
+26%
5-yr velocity

The verdict

Buildings OR LIKE Structures FOR Particular Purposes ranks #229 of 670 CPC technology areas - 6,263 US patents granted since 2015, with filing up 26% over five years.

#229
of 670 CPC technology areas
6,263
US patents granted, 2015–2025
Hayward Industries
leading assignee (83)
+26%
filing velocity, last 5 yrs
Top assignee: Hayward Industries, Inc. (83 patents)

CPC subclass E04H - BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL - covers 6,263 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 E04H is shaped by 20 distinct companies actively filing in this space. Hayward Industries, Inc. leads with 83 patents, followed by Pentair Water Pool And Spa, Inc. at 69 grants and Maytronics Ltd. at 67.

Filing activity in E04H is up 26% 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 E04H innovation accelerating?

US utility-patent grants per year in E04H, 2015–2025 - recent five years are up 26% versus 2015–2019.

400450500550600650700 20152016201720182019202020212022202320242025 444

Who leads E04H?

The 12 most active assignees in BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL - wider bars mean more grants

patents

What this shows Hayward Industries is the most active filer in E04H, holding 83 of the 6,263 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 E04H
Rank Company Patents in E04H
#1 Hayward Industries, Inc. 83
#2 Pentair Water Pool And Spa, Inc. 69
#3 Maytronics Ltd. 67
#4 Zodiac POOL Systems Llc 62
#5 Bestway Inflatables & Material Corp. 51
#6 Zodiac POOL CARE Europe 48
#7 Vestas Wind Systems A/s 44
#8 Intex Marketing Ltd. 35
#9 King Technology, Inc. 32
#10 Wobben Properties Gmbh 31
#11 Campvalley (xiamen) Co., Ltd. 29
#12 AQUA Products, Inc. 29
#13 Simpson Strong-tie Company, Inc. 23
#14 Polygroup Macau Limited (bvi) 23
#15 Crystal Lagoons Technologies, Inc. 23
#16 Ocado Innovation Limited 22
#17 GSG Holdings, Inc. 19
#18 Siemens Gamesa Renewable Energy 18
#19 Nabors Drilling Technologies USA, Inc. 18
#20 Trojan Leisure Products, Llc 18

About This Class

CPC subclass E04H belongs to class E04.

6,263 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 E04H 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 E04H assignees by class footprint. Bubble size = patents in E04H. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 E04H assignees by class footprint. Bubble size = patents in E04H. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 51015202530 20406080100 Patents in E04H Avg claims / patent (company-wide) Hayward IndustriesPentair Water Pool an…MaytronicsZodiac Pool SystemsBestway Inflatables &…Zodiac Pool Care Euro…Vestas Wind Systems A…Intex MarketingKing TechnologyWobben PropertiesCampvalley (Xiamen)Aqua ProductsSimpson Strong-tiePolygroup Macau (Bvi)
Top 14 E04H assignees by class footprint. Bubble size = patents in E04H. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class E04H?
CPC subclass E04H covers BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL. It belongs to CPC class E04 (BUILDING), with 6,263 US utility patents granted since 2015.
How many patents have been filed in E04H?
6,263 US utility patents were granted in CPC subclass E04H between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in E04H?
Hayward Industries, Inc. leads E04H with 83 patents, making it the most active assignee in this technology area.
How is patent data for E04H 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 E04H 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.