Where does Dowa Holdings Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Dowa Holdings Co., Ltd. ranks #13,390 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 Dowa Holdings Co., Ltd. hold?

Dowa Holdings Co., Ltd. holds 22 US utility patents granted between 2015 and 2025, spanning 29 technology areas.

What is Dowa Holdings Co., Ltd.'s Innovation Score?

Dowa Holdings Co., Ltd. has an Innovation Score of 38.1 out of 100 (top 42% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Dowa Holdings Co., Ltd. focus on?

Dowa Holdings Co., Ltd.'s top technology area is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution) with 10 patents, ranking #1,272 of 5,963 assignees active in that subclass. Grants appear in 29 CPC subclasses total.

Is Dowa Holdings Co., Ltd.'s patent grant rate increasing or decreasing?

Dowa Holdings Co., Ltd.'s recent grant velocity is -46% 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 Dowa Holdings Co., Ltd.'s patents?

Dowa Holdings Co., Ltd.'s patents average 10.1 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 Dowa Holdings Co., Ltd. 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

Dowa Holdings Co., Ltd.

USPTO PatentsView assignee record - 22 granted patents across 29 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: Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Dowa ranks #13,390 of 49,997 tracked US assignees by granted-patent volume, with 22 patents across 29 technology areas.

#13,390
of 49,997 US assignees by volume: Top 42%
by Innovation Score (38.1/100): 10.1
avg claims per patent: -46%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R13390 · Foreign Corporation #13,390 · 22 grants

GRANTS-SMALL · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-PAR · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-SMALL 22 grants
MID-PACK #13,390/49,997
PHOTO-FINISH Dartmouth-Hitchcock…
CPC-FOCUS Y02E · 29 areas
INNOV-THIN 38.1/100
CLAIMS-PAR 10.1 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -46% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Dartmouth-Hitchcock Clinic and (±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 Dowa’s 38.1 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 10.8 pts (28%) Velocity 2.2 pts (6%) Breadth 19.0 pts (50%) Claim depth 6.0 pts (16%)

Qualcomm Incorporated · highest

85
Dowa Holdings · this assignee

38
3D Lighting… · lowest

7

What this shows Dowa's Innovation Score is 38.1/100 (top 42% 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 Dowa?

Each dot is one of Dowa’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). Dowa’s own 10.1 claims/patent is at or below the 15.8 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Dowa's grants concentrate

Dowa Holdings Co., Ltd. is a focused PatentsView assignee: 29 CPC subclasses with 45.5% of grants classified under Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution). Peak complete grant year is 2017 (5 grants) versus a trough of 1 in 2015. By volume, Dowa sits between Denso Thermal Systems S.P.A. and Dellner Couplers AB.

Dowa's three-year grant acceleration

Dowa Holdings Co., Ltd. shows 3 grants in 2022–2024 against only 9 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Denso Thermal Sys…

22
Digiprint IP

22
DNA Twopointo

22
Dosatron Internat…

22
DST

22
Dusa Pharmaceutic…

22
Dartmouth-hitchco…

22
Dellner Couplers…

22
Dowa Holdings ◀

22

What this shows Dowa holds 22 patents at rank #13,381, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Dowa

By rank, the assignees closest to #13,381 in granted patent volume.

Leaders in Y02E (Reduction OF Greenhouse GAS [GHG] Emissions)

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

Dowa's Innovation Score vs. every tracked assignee

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

38 Top 42% higher than 58% 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

Dowa Holdings Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	4.5%
2016	1	4.5%
2017	5	22.7%
2018	1	4.5%
2019	5	22.7%
2020	4	18.2%
2022	1	4.5%
2023	1	4.5%
2024	1	4.5%
2025partial year	2	9.1%

Which technologies does Dowa Holdings Co., Ltd. patent most?

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 10

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 10

C01P - Indexing Scheme Relating TO Structural AND Physical Aspects OF Solid Inorganic Compounds 6

B82Y - Specific Uses OR Applications OF NANOSTRUCTURES; Measurement OR Analysis OF NANOSTRUCTURES; Manufacture OR Treatment OF Nanostructures 5

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 5

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 5

B22F - Working Metallic POWDER; Manufacture OF Articles From Metallic POWDER; Making Metallic Powder ; Apparatus OR Devices Specially Adapted FOR Metallic Powder 5

C01G - Compounds Containing Metals NOT Covered BY Subclasses C01d OR C01f 3

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 3

Y10T - Technical Subjects Covered BY Former US Classification 3

C04B - Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone 3

C09D - Coating Compositions, e.g. Paints, Varnishes OR LACQUERS; Filling PASTES; Chemical Paint OR INK REMOVERS; INKS; Correcting FLUIDS; WOODSTAINS; Pastes OR Solids FOR Colouring OR PRINTING; USE OF Materials Therefor 3

H01B - CABLES; CONDUCTORS; INSULATORS; Selection OF Materials FOR Their Conductive, Insulating OR Dielectric Properties 3

G21F - Protection Against X-radiation, Gamma Radiation, Corpuscular Radiation OR Particle BOMBARDMENT; Treating Radioactively Contaminated MATERIAL; Decontamination Arrangements Therefor 2

C02F - Treatment OF Water, Waste Water, Sewage, OR Sludge 2

Top 15 of 29 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

Dowa Holdings Co., Ltd.'s patent record in context - here's where to go next.

Dowa Holdings Co., Ltd.'s lead technology class is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution), 45.5% of its portfolio - see every assignee active in that class. Explore Y02E
Ranked #13,390 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Dowa Holdings Co., Ltd. against Denso Thermal Systems S.P.A., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 38.1/100 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.