PlainPatent

CPC technology class · E03

E03D - Water-closets Or Urinals With Flushing Devices

Water-closets or urinals with flushing devices; flushing valves therefor. 1,515 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

1,515
US patents granted
#2/4
in E03
20.7%
E03 class share
+6%
5-yr velocity

The verdict

According to USPTO PatentsView, Water-closets Or Urinals With Flushing Devices ranks #404 of 670 CPC technology areas - 1,515 US patents granted since 2015, with recorded grant volume up 6% over five years.

#404
of 670 CPC technology areas
1,515
US patents granted, 2015–2025
Toto
leading assignee (245)
+6%
grant velocity, last 5 yrs

How E03D's grant cadence moved

Between 2020–2024, E03D recorded 720 grants versus 678 in 2015–2019 (+6% equal-window velocity). Across complete years, output peaked in 2019 at 195 grants and bottomed in 2015 at 93 (+110% peak-over-trough). Lead assignee Toto Ltd. holds 16.2% of the class ; the top three share 28.1%.

Leaderboard read

E03D concentration, lead at 16.2%

Toto Ltd. leads this historical grant record at 16.2% of E03D - us corporation assignees hold 52% of class grants (579 of 1,114). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
16.2%

245 of 1,515 grants

Top three share
28.1%

of the class's recorded grants

Lead over #2
106

more grants than Kohler Co.

Where E03D sits inside E03

Among 4 subclasses in E03 (Water SUPPLY; Sewerage), E03D ranks #2 and holds 20.7% of the parent class's 7,304 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

E03C 2,911 E03B 1,503 E03F 1,375

Rising assignees active in E03D

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 Medic, Inc. 16x 1 → 16 company-wide · 11 in E03D
  2. #2 Bemis Manufacturing Company 7.00x 4 → 28 company-wide · 10 in E03D
  3. #3 Komoo Intelligent Technology Co., Ltd. 6.00x 0 → 6 company-wide · 6 in E03D
  4. #4 Thetford LLC 4.00x 3 → 12 company-wide · 6 in E03D
  5. #5 2 Go Products, LLC 4.00x 0 → 4 company-wide · 5 in E03D

E03D grants by year, peak 2019 (195)

US utility-patent grants per year in E03D, 2015–2025 - recent five years are up 6% versus 2015–2019.

50100150200250 20152016201720182019202020212022202320242025 107

Who leads E03D?

The 12 most active assignees in Water-closets OR Urinals With Flushing DEVICES; Flushing Valves Therefor - wider bars mean more grants

patents

What this shows Toto is the most active filer in E03D, holding 245 of the 1,515 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 E03D
Rank Company Patents in E03D
#1 Toto Ltd. 245
#2 Kohler Co. 139
#3 Shanghai Kohler Electronics, Ltd. 41
#4 Danco, Inc. 38
#5 AS America, Inc. 33
#6 Lixil Corporation 33
#7 SDB IP Holdings, LLC 29
#8 Sloan Valve Company 27
#9 MAG Aerospace Industries, LLC 24
#10 Fluidmaster, Inc. 24
#11 B/E Aerospace, Inc. 20
#12 Zurn Industries, LLC 19
#13 Geberit International AG 18
#14 Coway Co., Ltd. 16
#15 Delta Faucet Company 13
#16 Hall Labs LLC 13
#17 Lavelle Industries, Inc. 13
#18 Reckitt Benckiser LLC 11
#19 AS IP Holdco, LLC 11
#20 Coflex S.A. de C.V. 11

Footprint here vs. claim strategy

Each dot is a leading E03D 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 E03D assignees by class footprint. Bubble size = patents in E03D. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 0100200300 Patents in E03D Avg claims / patent (company-wide) TotoKohlerShanghai KohlerDancoAs AmericaLixilSdb Ip HoldingsSloan ValveMag Aerospace…FluidmasterB/E AerospaceZurn IndustriesGeberit InternationalCoway
Top 14 E03D assignees by class footprint. Bubble size = patents in E03D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near E03D's 1,515-grant footprint

Nationwide nearest neighbors for E03D (#404 of 670 by volume ; lead share 16.2%) - not the E03 parent-class siblings above.

Nearest by grant volume

C10B 1,527 E03B 1,503 B25H 1,500 F03B 1,544

Nearest by lead-assignee share

A01B 16.1% E21B 16.3% A24B 16.3% A01D 16.0%

Questions about E03D

Which company holds the most patents in E03D?
Toto Ltd. leads E03D with 245 patents (16.2% of the subclass). By PatentsView assignee type, us corporations account for 52% of class grants.
Which E03D assignees grew fastest recently?
Among assignees with ≥5 grants in E03D, Medic, Inc. shows the highest company-wide grant multiple (16x: 1 grants in 2019–2021 → 16 in 2022–2024) while holding 11 patents in this subclass. Growth is company-wide, not class-only.
How does E03D compare inside parent class E03?
Inside E03 (Water SUPPLY; Sewerage), E03D ranks #2 of 4 subclasses by grant volume and holds 20.7% of the parent class total. The largest sibling is E03C (2,911 grants).

What to do with this data

E03D 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 - E03D figures are USPTO PatentsView granted-utility totals for this subclass (1,515 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.