Where does Unicharm Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Unicharm Corporation ranks #820 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Unicharm Corporation hold?

Unicharm Corporation holds 560 US utility patents granted between 2015 and 2025, spanning 87 technology areas.

What is Unicharm Corporation's Innovation Score?

Unicharm Corporation has an Innovation Score of 56.9 out of 100 (top 6% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Unicharm Corporation's patent grant rate increasing or decreasing?

Unicharm Corporation's recent grant velocity is -67% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

What does claim depth mean for Unicharm Corporation's patents?

Unicharm Corporation's patents average 10.8 claims each. This is an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

How is the Unicharm Corporation patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Unicharm Corporation

Q: What technology areas does Unicharm Corporation focus on?

Unicharm Corporation's top technology area is A61F (Filters Implantable Into Blood VESSELS; PROSTHESES; Devices Providing Patency TO, OR Preventing Collapsing OF, Tubular Structures OF THE Body, e.g. STENTS; Orthopaedic, Nursing OR Contraceptive DEVICES; FOMENTATION; Treatment OR Protection OF Eyes OR EARS; Bandages, Dressings OR Absorbent PADS; Firs) with 369 patents, ranking #18 of 3,082 assignees active in that subclass. Grants appear in 87 CPC subclasses total.

USPTO PatentsView assignee record - 560 granted patents across 87 technology areas, recorded in grant years 2015–2025. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: A61F (Filters Implantable Into Blood VESSELS; PROSTHESES; Devices Providing Patency TO, OR Preventing Collapsing OF, Tubular Structures OF THE Body, e.g. STENTS; Orthopaedic, Nursing OR Contraceptive Device).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Unicharm ranks #820 of 49,997 tracked US assignees by granted-patent volume, with 560 patents across 87 technology areas.

#820
of 49,997 US assignees by volume: Top 6%
by Innovation Score (56.9/100): 10.8
avg claims per patent: -67%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R820 · Foreign Corporation #820 · 560 grants

GRANTS-MID · TOP-DECILE · PHOTO-FINISH · CPC-WIDE · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MID 560 grants
TOP-DECILE #820/49,997
PHOTO-FINISH Toto
CPC-WIDE A61F · 87 areas
INNOV-PAR 56.9/100
CLAIMS-PAR 10.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -67% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Toto Ltd. (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How Unicharm’s 56.9 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 21.9 pts (38%) Velocity 3.6 pts (6%) Breadth 25.0 pts (44%) Claim depth 6.5 pts (11%)

Qualcomm Incorporated · highest

85
Sentera · near

57
SNU R&DB Foundation · near

57
Symantec · near

57
Unicharm · this assignee

57
Cheng UEI Precision… · near

57
3D Lighting… · lowest

7

What this shows Unicharm's Innovation Score is 56.9/100 (top 6% of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for Unicharm?

Each dot is one of Unicharm’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). Unicharm’s own 10.8 claims/patent is at or below the 15.0 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

Unicharm vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

How Unicharm's grant cadence moved

Between 2020–2024, Unicharm Corporation received 136 grants versus 411 in 2015–2019 (-67% equal-window velocity, below median growth). Across complete PatentsView years, output peaked in 2015 at 130 grants and bottomed in 2024 at 17. Lead class A61F accounts for 65.9% of the portfolio across 87 subclasses. Volume neighbours: Electronic Arts Inc. (#816) and Zimmer, Inc. (#824).

Unicharm's three-year grant acceleration

From 2019–2021 to 2022–2024, Unicharm Corporation moved from 116 to 62 grants (0.53x the prior three-year total, a multiple, not a CAGR). Among 3,296 tracked assignees with ≥100 grants and ≥20 prior-period grants, that multiple ranks #2,609. See the growth leaderboard.

Arts

561
Gilead Sciences

561
Yaskawa Denki

561
Toto

560
Unicharm ◀

560
Valeo Vision

559
Dümmen Group B V

558
Minebea Mitsumi

558
Zimmer

558

What this shows Unicharm holds 560 patents at rank #820, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Unicharm

By rank, the assignees closest to #820 in granted patent volume.

Leaders in A61F (Filters Implantable Into Blood Vessels)

Other assignees with the most granted patents in Unicharm's primary technology class.

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Unicharm, neither rank-band nor same-CPC leaders (those blocks stay above). In A61F (Filters Implantable Into Blood Vessels), Unicharm ranks #18 of 3,082 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (57 here).

SNU R&DB Foundation 57 Symantec Corporation 57 Sentera, Inc. 57 Cheng UEI Precision Industry Co., Ltd. 57

Similar claim depth

Nearest assignees by average claims per patent (10.8 here).

Oki Electric Industry Co., Ltd. 10.8 avg Samsung Life Public Welfare Foundation 10.8 avg Takasago International Corporation 10.8 avg Toshiba Digital Solutions Corporation 10.8 avg

Unicharm's Innovation Score vs. every tracked assignee

Composite of portfolio volume, grant velocity, technology breadth, and claim depth (0–100)

57 Top 6% higher than 94% of 49,997 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2015–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Unicharm Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	130	23.2%
2016	111	19.8%
2017	57	10.2%
2018	71	12.7%
2019	42	7.5%
2020	42	7.5%
2021	32	5.7%
2022	27	4.8%
2023	18	3.2%
2024	17	3.0%
2025partial year	13	2.3%

Which technologies does Unicharm Corporation patent most?

A61F - Filters Implantable Into Blood VESSELS; PROSTHESES; Devices Providing Patency TO, OR Preventing Collapsing OF, Tubular Structures OF THE Body, e.g. STENTS; Orthopaedic, Nursing OR Contraceptive DEVICES; FOMENTATION; Treatment OR Protection OF Eyes OR EARS; Bandages, Dressings OR Absorbent PADS; Firs 369

A01K - Animal HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; Rearing OR Breeding Animals, NOT Otherwise Provided FOR; NEW Breeds OF Animals 98

B32B - Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form 62

Y10T - Technical Subjects Covered BY Former US Classification 53

A61L - Methods OR Apparatus FOR Sterilising Materials OR Objects IN GENERAL; Disinfection, Sterilisation OR Deodorisation OF AIR; Chemical Aspects OF Bandages, Dressings, Absorbent Pads OR Surgical ARTICLES; Materials FOR Bandages, Dressings, Absorbent Pads OR Surgical Articles 53

B29L - Indexing Scheme Associated With Subclass B29c, Relating TO Particular Articles 40

B29C - Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing 36

D04H - Making Textile Fabrics, e.g. From Fibres OR Filamentary Material ; Fabrics Made BY Such Processes OR Apparatus, e.g. Felts, Non-woven FABRICS; COTTON-WOOL; Wadding ; ; Non-woven Fabrics From Staple Fibres, Filaments OR Yarns, Bonded With AT Least ONE Web-like Material During Their Consolidation 35

A47L - Domestic Washing OR Cleaning ; Suction Cleaners IN General 32

B09B - Disposal OF Solid Waste NOT Otherwise Provided FOR 28

Y02W - Climate Change Mitigation Technologies Related TO Wastewater Treatment OR Waste Management 27

B29B - Preparation OR Pretreatment OF THE Material TO BE SHAPED; Making Granules OR PREFORMS; Recovery OF Plastics OR Other Constituents OF Waste Material Containing Plastics 27

B65H - Handling Thin OR Filamentary Material, e.g. Sheets, Webs, Cables 26

D21C - Production OF Cellulose BY Removing Non-cellulose Substances From Cellulose-containing MATERIALS; Regeneration OF Pulping LIQUORS; Apparatus Therefor 25

C08J - WORKING-UP; General Processes OF COMPOUNDING; After-treatment NOT Covered BY Subclasses C08b, C08c, C08f, C08g or C08h 21

Top 15 of 87 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

Unicharm Corporation's patent record in context - here's where to go next.

Unicharm Corporation's lead technology class is A61F (Filters Implantable Into Blood VESSELS; PROSTHESES; Devices Providing Patency TO, OR Preventing Collapsing OF, Tubular Structures OF THE Body, e.g. STENTS; Orthopaedic, Nursing OR Contraceptive Device), 65.9% of its portfolio - see every assignee active in that class. Explore A61F
Ranked #820 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Unicharm Corporation against Electronic Arts Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 56.9/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

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

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled by PlainPatent , US Patent Intelligence Editorial Process · May 15, 2026

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. Data current as of May 2026.