CPC technology class · A61

A61H - Physical Therapy Apparatus

Physical therapy apparatus, e.g. devices for locating or stimulating reflex points in the body; artificial respiration; massage; bathing devices for special therapeutic or hygienic purposes or specific parts of the body. 6,990 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

6,990
US patents granted: #10/13
in A61: 1.1%
A61 class share: +34%
5-yr velocity

The verdict

According to USPTO PatentsView, Physical Therapy Apparatus ranks #207 of 670 CPC technology areas - 6,990 US patents granted since 2015, with recorded grant volume up 34% over five years.

#207
of 670 CPC technology areas: 6,990
US patents granted, 2015–2025: Zoll Medical
leading assignee (205): +34%
grant velocity, last 5 yrs

How A61H's grant cadence moved

Between 2020–2024, A61H recorded 3,500 grants versus 2,607 in 2015–2019 (+34% equal-window velocity). Across complete years, output peaked in 2020 at 768 grants and bottomed in 2015 at 385 (+99% peak-over-trough). Lead assignee Zoll Medical Corporation holds 2.9% of the class ; the top three share 4.8%.

Leaderboard read

A61H concentration, lead at 2.9%

Zoll Medical Corporation leads this historical grant record at 2.9% of A61H - us corporation assignees hold 67% of class grants (2,351 of 3,501). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 2.9%
Top three share: 4.8%
Lead over #2: 125

Where A61H sits inside A61

Among 13 subclasses in A61 (Medical OR Veterinary SCIENCE; Hygiene), A61H ranks #10 and holds 1.1% of the parent class's 646,867 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

A61B 162,009 A61K 151,067 A61P 125,535 A61M 57,639 A61F 50,959 A61N 30,889 A61L 25,308 A61Q 14,001

Rising assignees active in A61H

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 Therabody, Inc. 119x 1 → 119 company-wide · 34 in A61H
#2 Hytto PTE. Ltd. 33x 0 → 33 company-wide · 46 in A61H
#3 Hyperice IP Subco, LLC 20x 0 → 20 company-wide · 13 in A61H
#4 Nextern Innovation, LLC 19x 0 → 19 company-wide · 5 in A61H
#5 Lipocosm, LLC 12x 1 → 12 company-wide · 8 in A61H

A61H grants by year, peak 2020 (768)

US utility-patent grants per year in A61H, 2015–2025 - recent five years are up 34% versus 2015–2019.

Zoll Medical

205
Physio-control

80
Rom

54
Kci Licensing

48
Hytto Pte

46
Ekso Bionics Holdings

43
Medline Industries

40
Zoll Circulation

40
Hill-rom Services

38
Therabody

34
L'oreal

33
Kohler

33

What this shows Zoll Medical is the most active filer in A61H, holding 205 of the 6,990 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 A61H
Rank	Company	Patents in A61H
#1	Zoll Medical Corporation	205
#2	Physio-control, Inc.	80
#3	ROM Technologies, Inc.	54
#4	KCI Licensing, Inc.	48
#5	Hytto PTE. Ltd.	46
#6	Ekso Bionics Holdings, Inc.	43
#7	Medline Industries, LP	40
#8	Zoll Circulation, Inc.	40
#9	Hill-Rom Services, Inc.	38
#10	Therabody, Inc.	34
#11	L'Oreal	33
#12	Kohler Co.	33
#13	Valencia Technologies Corporation	31
#14	Guided Therapy Systems, LLC	28
#15	Stryker Corporation	24
#16	Hayward Industries, Inc.	21
#17	Theragun, Inc.	20
#18	Dephy, Inc.	20
#19	Ceragem Co., Ltd.	19
#20	Bullfrog International, LC	18

Footprint here vs. claim strategy

Each dot is a leading A61H 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 A61H assignees by class footprint. Bubble size = patents in A61H. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near A61H's 6,990-grant footprint

Nationwide nearest neighbors for A61H (#207 of 670 by volume ; lead share 2.9%) - not the A61 parent-class siblings above.

Nearest by grant volume

B60J 6,966 F21K 7,021 F15B 7,094 C01G 6,857

Nearest by lead-assignee share

Y02C 2.9% E01F 2.9% F26B 2.9% C12R 2.9%

Questions about A61H

Which company holds the most patents in A61H?

Zoll Medical Corporation leads A61H with 205 patents (2.9% of the subclass). By PatentsView assignee type, us corporations account for 67% of class grants.

Which A61H assignees grew fastest recently?

Among assignees with ≥5 grants in A61H, Therabody, Inc. shows the highest company-wide grant multiple (119x: 1 grants in 2019–2021 → 119 in 2022–2024) while holding 34 patents in this subclass. Growth is company-wide, not class-only.

How does A61H compare inside parent class A61?

Inside A61 (Medical OR Veterinary SCIENCE; Hygiene), A61H ranks #10 of 13 subclasses by grant volume and holds 1.1% of the parent class total. The largest sibling is A61B (162,009 grants).

What to do with this data

A61H in context - here's where to go next.

Zoll Medical Corporation leads A61H with 205 grants in this class. See full portfolio
A61H ranks #207 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class A61, the largest sibling subclass is A61B with 162,009 grants. Explore A61B

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

Methodology - A61H figures are USPTO PatentsView granted-utility totals for this subclass (6,990 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.