CPC technology class · E01

E01H - Street Cleaning

Street cleaning; cleaning of permanent ways; cleaning beaches; dispersing ; or preventing; fog in general ; cleaning street or railway furniture or tunnel walls. 971 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

971
US patents granted: #4/5
in E01: 13.2%
E01 class share: -4%
5-yr velocity

The verdict

According to USPTO PatentsView, Street Cleaning ranks #464 of 670 CPC technology areas - 971 US patents granted since 2015, with recorded grant volume down 4% over five years.

#464
of 670 CPC technology areas: 971
US patents granted, 2015–2025: Honda Motor
leading assignee (38): -4%
grant velocity, last 5 yrs

How E01H's grant cadence moved

Between 2020–2024, E01H recorded 436 grants versus 456 in 2015–2019 (-4% equal-window velocity). Across complete years, output peaked in 2019 at 107 grants and bottomed in 2021 at 77 (+39% peak-over-trough). Lead assignee Briggs & Stratton, LLC holds 3.0% of the class ; the top three share 8.2%.

Leaderboard read

E01H concentration, lead at 3.0%

Briggs & Stratton, LLC leads this historical grant record at 3.0% of E01H - us corporation assignees hold 69% of class grants (325 of 472). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 3.0%
Top three share: 8.2%
Lead over #2: 2

Where E01H sits inside E01

Among 5 subclasses in E01 (Construction OF Roads, Railways, OR Bridges), E01H ranks #4 and holds 13.2% of the parent class's 7,343 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

E01C 3,503 E01F 1,276 E01B 981 E01D 612

Rising assignees active in E01H

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 Discovery Purchaser Corporation 11x 0 → 11 company-wide · 6 in E01H
#2 Old Dominion Brush Company 10x 1 → 10 company-wide · 11 in E01H
#3 Greenworks (Jiangsu) Co., Ltd. 6.00x 0 → 6 company-wide · 6 in E01H
#4 Globe (Jiangsu) Co., Ltd. 4.14x 28 → 116 company-wide · 7 in E01H
#5 Venture Products, Inc. 3.00x 5 → 15 company-wide · 9 in E01H

E01H grants by year, peak 2019 (107)

US utility-patent grants per year in E01H, 2015–2025 - recent five years are down 4% versus 2015–2019.

Briggs & Stratton

29
The Toro

27
Mtd Products

24
Prinoth S P A

22
Douglas Dynamics L L C

14
Andreas Stihl & Kg

13
Chervon (Hk)

12
Federal Signal

12
Meyer Products

12
Old Dominion Brush

11
Hydro-gear Partnership

10
Positec Power Tools…

10

What this shows Honda Motor is the most active filer in E01H, holding 38 of the 971 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

View data table

Top patent holders in CPC subclass E01H
Rank	Company	Patents in E01H
#1	Briggs & Stratton, LLC	29
#2	THE Toro Company	27
#3	MTD Products Inc	24
#4	Prinoth S.P.A.	22
#5	Douglas Dynamics, L.L.C.	14
#6	Andreas Stihl AG & Co. KG	13
#7	Chervon (HK) Limited	12
#8	Federal Signal Corporation	12
#9	Meyer Products, LLC	12
#10	Old Dominion Brush Company	11
#11	Hydro-Gear Limited Partnership	10
#12	Positec Power Tools (Suzhou) Co., Ltd.	10
#13	Winter Equipment Company	10
#14	Soucy International Inc.	9
#15	Venture Products, Inc.	9
#16	Alamo Group Inc.	9
#17	Pro-Tech Manufacturing and Distribution, Inc.	9
#18	Nanjing Chervon Industry Co., Ltd.	8
#19	Ariens Company	8
#20	Clevertivity LLC	8

Footprint here vs. claim strategy

Each dot is a leading E01H 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 E01H assignees by class footprint. Bubble size = patents in E01H. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near E01H's 971-grant footprint

Nationwide nearest neighbors for E01H (#464 of 670 by volume ; lead share 3.9%) - not the E01 parent-class siblings above.

Nearest by grant volume

A23F 971 C01D 976 A41B 979 E21D 962

Nearest by lead-assignee share

B66C 3.9% G05B 3.9% B60G 3.9% F41C 3.9%

Questions about E01H

Which company holds the most patents in E01H?

Honda Motor Co., Ltd. leads E01H with 38 patents (3.0% of the subclass). By PatentsView assignee type, us corporations account for 69% of class grants.

Which E01H assignees grew fastest recently?

Among assignees with ≥5 grants in E01H, Discovery Purchaser Corporation shows the highest company-wide grant multiple (11x: 0 grants in 2019–2021 → 11 in 2022–2024) while holding 6 patents in this subclass. Growth is company-wide, not class-only.

How does E01H compare inside parent class E01?

Inside E01 (Construction OF Roads, Railways, OR Bridges), E01H ranks #4 of 5 subclasses by grant volume and holds 13.2% of the parent class total. The largest sibling is E01C (3,503 grants).

What to do with this data

E01H in context - here's where to go next.

Briggs & Stratton, LLC leads E01H with 29 grants in this class. See full portfolio
E01H ranks #464 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class E01, the largest sibling subclass is E01C with 3,503 grants. Explore E01C

Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.

Methodology - E01H figures are USPTO PatentsView granted-utility totals for this subclass (971 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.