Where does Drax Power Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Drax Power Limited ranks #31,446 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 Drax Power Limited hold?

Drax Power Limited holds 8 US utility patents granted between 2015 and 2019, spanning 2 technology areas.

What is Drax Power Limited's Innovation Score?

Drax Power Limited has an Innovation Score of 20.7 out of 100 (7th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Drax Power Limited focus on?

Drax Power Limited's top technology area is B61D (Body Details OR Kinds OF Railway Vehicles) with 4 patents. Grants appear in 2 CPC subclasses total.

Is Drax Power Limited's patent grant rate increasing or decreasing?

Drax Power Limited's recent grant velocity is -100% 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 Drax Power Limited's patents?

Drax Power Limited's patents average 13.5 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 Drax Power Limited 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

Drax Power Limited

USPTO PatentsView assignee record - 8 granted patents across 2 technology areas, recorded in grant years 2015–2019. 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: B61D (Body Details OR Kinds OF Railway Vehicles).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Drax ranks #31,446 of 49,997 tracked US assignees by granted-patent volume, with 8 patents across 2 technology areas.

#31,446
of 49,997 US assignees by volume: 7th percentile
by Innovation Score (20.7/100): 13.5
avg claims per patent: -100%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R31446 · Foreign Corporation #31,446 · 8 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-RICH · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 8 grants
MID-PACK #31,446/49,997
PHOTO-FINISH Dover Chemical
CPC-NARROW B61D · 2 areas
INNOV-THIN 20.7/100
CLAIMS-RICH 13.5 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -100% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Dover Chemical Corporation (±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.

Qualcomm Incorporated · highest

85
Drax Power · this assignee

21
3D Lighting… · lowest

7

What this shows Drax's Innovation Score is 20.7/100 (7th percentile 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.

Where Drax's grants concentrate

Drax Power Limited is a focused PatentsView assignee: 2 CPC subclasses with 50% of grants classified under B61D (Body Details OR Kinds OF Railway Vehicles). Peak complete grant year is 2016 (2 grants) versus a trough of 1 in 2015. By volume, Drax sits between Dover Chemical Corporation and Durham Enterprises Corporation.

Dover Chemical

8
Dover Fueling Sol…

8
Draka Comteq Fran…

8
Drapho Technology

8
Dryfhout Properti…

8
Dubois Chemicals

8
Ductmate Industri…

8
Durham Enterprises

8
Drax Power ◀

8

What this shows Drax holds 8 patents at rank #31,463, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Drax

By rank, the assignees closest to #31,463 in granted patent volume.

Leaders in B61D (Body Details OR Kinds OF Railway Vehicles)

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

Drax's Innovation Score vs. every tracked assignee

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

21 7th percentile higher than 7% 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 · 2015–2019

Grants by year

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

View data table

Drax Power Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	12.5%
2016	2	25.0%
2017	2	25.0%
2018	2	25.0%
2019	1	12.5%

Which technologies does Drax Power Limited patent most?

B61D - Body Details OR Kinds OF Railway Vehicles 4

B61F - Rail Vehicle Suspensions, e.g. Underframes, Bogies OR Arrangements OF Wheel AXLES; Rail Vehicles FOR USE ON Tracks OF Different WIDTH; Preventing Derailing OF Rail VEHICLES; Wheel Guards, Obstruction Removers OR THE Like FOR Rail Vehicles 1

Top 2 of 2 technology areas

Where it ranks

Overall rank by patents

#31,446

of 49,997 tracked assignees

Innovation Score

20.7 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

What to do with this data

Drax Power Limited's patent record in context - here's where to go next.

Drax Power Limited's lead technology class is B61D (Body Details OR Kinds OF Railway Vehicles), 50% of its portfolio - see every assignee active in that class. Explore B61D
Ranked #31,446 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Drax Power Limited against Dover Chemical Corporation, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 20.7/100 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.