Where does Douglas Technical Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Douglas Technical Limited ranks #46,274 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 Douglas Technical Limited hold?

Douglas Technical Limited holds 5 US utility patents granted between 2020 and 2022, spanning 7 technology areas.

What is Douglas Technical Limited's Innovation Score?

Douglas Technical Limited has an Innovation Score of 33.9 out of 100 (46th 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 Douglas Technical Limited focus on?

Douglas Technical Limited's top technology area is F23G (Cremation FURNACES; Consuming Waste Products BY Combustion) with 5 patents, ranking #16 of 135 assignees active in that subclass. Grants appear in 7 CPC subclasses total.

Is Douglas Technical Limited's patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for Douglas Technical Limited.

What does claim depth mean for Douglas Technical Limited's patents?

Douglas Technical Limited's patents average 23.2 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 Douglas Technical 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

Douglas Technical Limited

USPTO PatentsView assignee record - 5 granted patents across 7 technology areas, recorded in grant years 2020–2022. 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: F23G (Cremation FURNACES; Consuming Waste Products BY Combustion).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Douglas ranks #46,274 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 7 technology areas.

#46,274
of 49,997 US assignees by volume: 46th percentile
by Innovation Score (33.9/100): 23.2
avg claims per patent

USPTO PatentsView assignee plate

Corpus R46274 · Foreign Corporation #46,274 · 5 grants

GRANTS-MICRO · BOTTOM-DECILE · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-DENSE · TYPE-FRNCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 5 grants
BOTTOM-DECILE #46,274/49,997
PHOTO-FINISH Dongshin Hydraulics
CPC-NARROW F23G · 7 areas
INNOV-THIN 33.9/100
CLAIMS-DENSE 23.2 claims/avg
TYPE-FRNCORP Foreign Corp
SPAN-YRS 2020–2022 · 3y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Dongshin Hydraulics Co., 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 Douglas’s 33.9 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 6.2 pts (18%) Velocity 4.4 pts (13%) Breadth 9.4 pts (28%) Claim depth 13.9 pts (41%)

Qualcomm Incorporated · highest

85
Douglas Technical · this assignee

34
3D Lighting… · lowest

7

What this shows Douglas's Innovation Score is 33.9/100 (46th 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.

Does more volume mean deeper claims for Douglas?

Each dot is one of Douglas’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). Douglas’s own 23.2 claims/patent is ABOVE the 13.4 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Douglas's grants concentrate

Douglas Technical Limited is a focused PatentsView assignee: 7 CPC subclasses with 100% of grants classified under F23G (Cremation FURNACES; Consuming Waste Products BY Combustion). Peak complete grant year is 2020 (2 grants) versus a trough of 1 in 2021. By volume, Douglas sits between Dongshin Hydraulics Co., Ltd. and Driploc, Inc..

Douglas's three-year grant acceleration

Douglas Technical Limited shows 2 grants in 2022–2024 against only 3 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.

Dongshin Hydrauli…

5
Dorf Ketal Chemic…

5
Dotproduct

5
Doug Carson & Ass…

5
Dr Brown's

5
Drsignal Biotechn…

5
Dreadnought

5
Driploc

5
Douglas Technical ◀

5

What this shows Douglas holds 5 patents at rank #46,326, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Douglas

By rank, the assignees closest to #46,326 in granted patent volume.

Leaders in F23G (Cremation Furnaces)

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

Douglas's Innovation Score vs. every tracked assignee

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

34 46th percentile higher than 46% 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 · 2020–2022

Grants by year

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

View data table

Douglas Technical Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2020	2	40.0%
2021	1	20.0%
2022	2	40.0%

Which technologies does Douglas Technical Limited patent most?

F23G - Cremation FURNACES; Consuming Waste Products BY Combustion 5

F26B - Drying Solid Materials OR Objects BY Removing Liquid Therefrom 5

F23J - Removal OR Treatment OF Combustion Products OR Combustion RESIDUES; Flues 3

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 2

F23L - Supplying AIR OR Non-combustible Liquids OR Gases TO Combustion Apparatus IN General ; Valves OR Dampers Specially Adapted FOR Controlling AIR Supply OR Draught IN Combustion Apparatus ; Inducing Draught IN Combustion APPARATUS; Tops FOR Chimneys OR Ventilating SHAFTS; Terminals FOR Flues 2

B27N - Manufacture BY DRY Processes OF Articles, With OR Without Organic Binding Agents, Made From Particles OR Fibres Consisting OF Wood OR Other Lignocellulosic OR Like Organic Material 2

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 1

Top 7 of 7 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

Douglas Technical Limited's patent record in context - here's where to go next.

Douglas Technical Limited's lead technology class is F23G (Cremation FURNACES; Consuming Waste Products BY Combustion), 100% of its portfolio - see every assignee active in that class. Explore F23G
Ranked #46,274 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Douglas Technical Limited against Dongshin Hydraulics Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 33.9/100 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.