Where does ClearSign Technologies Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), ClearSign Technologies Corporation ranks #10,896 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 ClearSign Technologies Corporation hold?

ClearSign Technologies Corporation holds 28 US utility patents granted between 2020 and 2025, spanning 15 technology areas.

What is ClearSign Technologies Corporation's Innovation Score?

ClearSign Technologies Corporation has an Innovation Score of 46.0 out of 100 (top 22% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does ClearSign Technologies Corporation focus on?

ClearSign Technologies Corporation's top technology area is F23D (Burners) with 25 patents. Grants appear in 15 CPC subclasses total.

Is ClearSign Technologies Corporation's patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for ClearSign Technologies Corporation.

What does claim depth mean for ClearSign Technologies Corporation's patents?

ClearSign Technologies Corporation's patents average 34.0 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 ClearSign Technologies 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 US Corporation

ClearSign Technologies Corporation

USPTO PatentsView assignee record - 28 granted patents across 15 technology areas, recorded in grant years 2020–2025. 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: F23D (Burners).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Clearsign ranks #10,896 of 49,997 tracked US assignees by granted-patent volume, with 28 patents across 15 technology areas.

#10,896
of 49,997 US assignees by volume: Top 22%
by Innovation Score (46.0/100): 34.0
avg claims per patent

USPTO PatentsView assignee plate

Corpus R10896 · US Corporation #10,896 · 28 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-DENSE · TYPE-USCORP · SPAN-YRS · BOOK-RICH

GRANTS-SMALL 28 grants
UPPER-Q #10,896/49,997
PHOTO-FINISH Cianna Medical
CPC-FOCUS F23D · 15 areas
INNOV-PAR 46.0/100
CLAIMS-DENSE 34.0 claims/avg
TYPE-USCORP US Corporation
SPAN-YRS 2020–2025 · 6y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Cianna Medical, Inc. (±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
Clean Energy Labs · near

46
Inter-University… · near

46
ClearSign · this assignee

46
CTB · near

46
Hisense Broadband… · near

46
3D Lighting… · lowest

7

What this shows Clearsign's Innovation Score is 46.0/100 (top 22% 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 Clearsign's grants concentrate

ClearSign Technologies Corporation is a focused PatentsView assignee: 15 CPC subclasses with 89.3% of grants classified under F23D (Burners). Peak complete grant year is 2020 (10 grants) versus a trough of 4 in 2021. By volume, Clearsign sits between Cianna Medical, Inc. and Dispelix OY.

Clearsign's three-year grant acceleration

ClearSign Technologies Corporation shows 12 grants in 2022–2024 against only 14 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.

Cianna Medical

28
Clariant Produkte…

28
Clean Energy Labs

28
Clearcam

28
Comau

28
Comcast Interacti…

28
Crystaphase Produ…

28
Dispelix OY

28
Clearsign ◀

28

What this shows ClearSign holds 28 patents at rank #10,903, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near ClearSign

By rank, the assignees closest to #10,903 in granted patent volume.

Leaders in F23D (Burners)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for ClearSign, neither rank-band nor same-CPC leaders (those blocks stay above).

Similar innovation score

Nearest assignees by Innovation Score (46 here).

CTB, Inc. 46 Hisense Broadband Multimedia Technologies Co., Ltd. 46 Clean Energy Labs, LLC 46 Inter-University Research Institute Corporation Research Organization of Information and Systems 46

Clearsign's Innovation Score vs. every tracked assignee

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

46 Top 22% higher than 78% 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 · 2020–2025

Grants by year

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

View data table

ClearSign Technologies Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2020	10	35.7%
2021	4	14.3%
2022	6	21.4%
2024	6	21.4%
2025partial year	2	7.1%

Which technologies does ClearSign Technologies Corporation patent most?

F23D - Burners 25

F23C - Methods OR Apparatus FOR Combustion Using Fluid Fuel OR Solid Fuel Suspended IN ; A Carrier GAS OR; AIR 17

F23N - Regulating OR Controlling Combustion 15

F27D - Details OR Accessories OF Furnaces, Kilns, Ovens OR Retorts, IN SO FAR AS They ARE OF Kinds Occurring IN More Than ONE Kind OF Furnace 5

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 5

F23M - Casings, Linings, Walls OR Doors Specially Adapted FOR Combustion Chambers, e.g. FIREBRIDGES; Devices FOR Deflecting AIR, Flames OR Combustion Products IN Combustion CHAMBERS; Safety Arrangements Specially Adapted FOR Combustion APPARATUS; Details OF Combustion Chambers, NOT Otherwise Provided FOR 4

F23Q - Ignition ; Extinguishing-devices 3

Y02T - Climate Change Mitigation Technologies Related TO Transportation 2

F27B - Furnaces, Kilns, Ovens OR Retorts IN GENERAL; Open Sintering OR Like Apparatus 2

G01M - Testing Static OR Dynamic Balance OF Machines OR STRUCTURES; Testing OF Structures OR Apparatus, NOT Otherwise Provided FOR 2

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 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

F23R - Generating Combustion Products OF High Pressure OR High Velocity, e.g. Gas-turbine Combustion Chambers 1

B23P - Metal-working NOT Otherwise Provided FOR; Combined OPERATIONS; Universal Machine Tools 1

H05H - Plasma Technique ; Production OF Accelerated Electrically-charged Particles OR OF NEUTRONS; Production OR Acceleration OF Neutral Molecular OR Atomic Beams 1

Top 15 of 15 technology areas

Where it ranks

Overall rank by patents

#10,896

of 49,997 tracked assignees

Innovation Score

46.0 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

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

ClearSign Technologies Corporation's lead technology class is F23D (Burners), 89.3% of its portfolio - see every assignee active in that class. Explore F23D
Ranked #10,896 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare ClearSign Technologies Corporation against Cianna Medical, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 46.0/100 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.