Where does Doosan Fuel Cell America, Inc. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Doosan Fuel Cell America, Inc. ranks #8,578 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 Doosan Fuel Cell America, Inc. hold?

Doosan Fuel Cell America, Inc. holds 37 US utility patents granted between 2015 and 2025, spanning 21 technology areas.

What is Doosan Fuel Cell America, Inc.'s Innovation Score?

Doosan Fuel Cell America, Inc. has an Innovation Score of 38.0 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%).

Is Doosan Fuel Cell America, Inc.'s patent grant rate increasing or decreasing?

Doosan Fuel Cell America, Inc.'s recent grant velocity is -56% 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 Doosan Fuel Cell America, Inc.'s patents?

Doosan Fuel Cell America, Inc.'s patents average 15.4 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 Doosan Fuel Cell America, Inc. 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 US Corporation

Doosan Fuel Cell America, Inc.

Q: What technology areas does Doosan Fuel Cell America, Inc. focus on?

Doosan Fuel Cell America, Inc.'s top technology area is H01M (Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy) with 34 patents, ranking #200 of 2,332 assignees active in that subclass. Grants appear in 21 CPC subclasses total.

USPTO PatentsView assignee record - 37 granted patents across 21 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: H01M (Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Doosan ranks #8,578 of 49,997 tracked US assignees by granted-patent volume, with 37 patents across 21 technology areas.

#8,578
of 49,997 US assignees by volume: Top 42%
by Innovation Score (38.0/100): 15.4
avg claims per patent: -56%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R8578 · US Corporation #8,578 · 37 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-RICH · TYPE-USCORP · VEL-DROP · BOOK-FULL

GRANTS-SMALL 37 grants
UPPER-Q #8,578/49,997
PHOTO-FINISH DAF Trucks
CPC-FOCUS H01M · 21 areas
INNOV-THIN 38.0/100
CLAIMS-RICH 15.4 claims/avg
TYPE-USCORP US Corporation
VEL-DROP -56% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: DAF Trucks N.V. (±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 Doosan’s 38.0 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 12.6 pts (33%) Velocity 0.0 pts (0%) Breadth 16.2 pts (43%) Claim depth 9.2 pts (24%)

Qualcomm Incorporated · highest

85
Caregen · near

38
Dioxide Materials · near

38
Doosan Fuel Cell… · this assignee

38
MediGuide · near

38
Young Chang Chemical · near

38
3D Lighting… · lowest

7

What this shows Doosan's Innovation Score is 38.0/100 (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 Doosan?

Each dot is one of Doosan’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). Doosan’s own 15.4 claims/patent is at or below the 16.8 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Doosan's grants concentrate

Doosan Fuel Cell America, Inc. is a focused PatentsView assignee: 21 CPC subclasses with 91.9% of grants classified under H01M (Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy). Peak complete grant year is 2017 (9 grants) versus a trough of 1 in 2015. By volume, Doosan sits between DAF Trucks N.V. and Dal-Tile, LLC.

DAF Trucks

37
Danfoss (Tianjin)

37
Deca

37
Diveplane

37
Draeger Safety UK

37
Daimler Truck Nor…

37
Daktronics

37
Dal-tile

37
Doosan Fuel Cell… ◀

37

What this shows Doosan holds 37 patents at rank #8,571, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Doosan

By rank, the assignees closest to #8,571 in granted patent volume.

Leaders in H01M (Processes OR Means)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Doosan, neither rank-band nor same-CPC leaders (those blocks stay above). In H01M (Processes OR Means), Doosan ranks #200 of 2,332 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (38 here).

Dioxide Materials, Inc. 38 Caregen Co., Ltd. 38 Young Chang Chemical Co., Ltd 38 MediGuide Ltd. 38

Doosan'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

Doosan Fuel Cell America, Inc. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	2.7%
2016	3	8.1%
2017	9	24.3%
2018	7	18.9%
2019	5	13.5%
2020	4	10.8%
2021	7	18.9%
2025partial year	1	2.7%

Which technologies does Doosan Fuel Cell America, Inc. patent most?

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 34

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 34

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 8

Y02B - Climate Change Mitigation Technologies Related TO Buildings, e.g. Housing, House Appliances OR Related End-user Applications 5

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

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

F28D - Heat-exchange Apparatus, NOT Provided FOR IN Another Subclass, IN Which THE Heat-exchange Media DO NOT Come Into Direct Contact 3

F28F - Details OF Heat-exchange AND Heat-transfer Apparatus, OF General Application 3

F22B - Methods OF Steam GENERATION; Steam Boilers 2

Y10T - Technical Subjects Covered BY Former US Classification 2

B01D - Separation 2

E04D - Roof COVERINGS; SKY-LIGHTS; GUTTERS; Roof-working Tools 1

B05C - Apparatus FOR Applying Fluent Materials TO Surfaces, IN General 1

B05B - Spraying APPARATUS; Atomising APPARATUS; Nozzles 1

B05D - Processes FOR Applying Fluent Materials TO Surfaces, IN General 1

Top 15 of 21 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

Doosan Fuel Cell America, Inc.'s patent record in context - here's where to go next.

Doosan Fuel Cell America, Inc.'s lead technology class is H01M (Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy), 91.9% of its portfolio - see every assignee active in that class. Explore H01M
Ranked #8,578 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Doosan Fuel Cell America, Inc. against DAF Trucks N.V., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 38.0/100 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.