Where does Hunan University OF Science AND Technology rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Hunan University OF Science AND Technology ranks #8,824 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 Hunan University OF Science AND Technology hold?

Hunan University OF Science AND Technology holds 36 US utility patents granted between 2020 and 2025, spanning 38 technology areas.

What is Hunan University OF Science AND Technology's Innovation Score?

Hunan University OF Science AND Technology has an Innovation Score of 48.8 out of 100 (top 16% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Hunan University OF Science AND Technology's patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for Hunan University OF Science AND Technology.

What does claim depth mean for Hunan University OF Science AND Technology's patents?

Hunan University OF Science AND Technology's patents average 7.5 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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Hunan University OF Science AND Technology

Q: What technology areas does Hunan University OF Science AND Technology focus on?

Hunan University OF Science AND Technology's top technology area is E21B (Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells) with 11 patents, ranking #341 of 1,363 assignees active in that subclass. Grants appear in 38 CPC subclasses total.

Q: How is the Hunan University OF Science AND Technology 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 PatentsView assignee record - 36 granted patents across 38 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: E21B (Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Hunan ranks #8,824 of 49,997 tracked US assignees by granted-patent volume, with 36 patents across 38 technology areas.

#8,824
of 49,997 US assignees by volume: Top 16%
by Innovation Score (48.8/100): 7.5
avg claims per patent

USPTO PatentsView assignee plate

Corpus R8824 · Foreign Corporation #8,824 · 36 grants

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

GRANTS-SMALL 36 grants
UPPER-Q #8,824/49,997
PHOTO-FINISH Hahn-Schickard-Gesel…
CPC-FOCUS E21B · 38 areas
INNOV-PAR 48.8/100
CLAIMS-SPARSE 7.5 claims/avg
TYPE-FRNCORP Foreign Corp
SPAN-YRS 2020–2025 · 6y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Hahn-Schickard-Gesellschaft für Angewandte Forschung e. 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 Hunan’s 48.8 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 12.5 pts (26%) Velocity 10.0 pts (20%) Breadth 21.8 pts (45%) Claim depth 4.5 pts (9%)

Qualcomm Incorporated · highest

85
APR Beauty Group · near

49
Haldex Brake… · near

49
Hunan University OF… · this assignee

49
Suez International · near

49
Universidade DE… · near

49
3D Lighting… · lowest

7

What this shows Hunan's Innovation Score is 48.8/100 (top 16% 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 Hunan?

Each dot is one of Hunan’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). Hunan’s own 7.5 claims/patent is at or below the 16.1 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Hunan's grants concentrate

Hunan University OF Science AND Technology is a focused PatentsView assignee: 38 CPC subclasses with 30.6% of grants classified under E21B (Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells). Peak complete grant year is 2021 (10 grants) versus a trough of 4 in 2020. By volume, Hunan sits between Hamilton Associates, Inc. and Huntleigh Technology Limited.

Hunan's three-year grant acceleration

Hunan University OF Science AND Technology shows 21 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.

Hamilton Associat…

36
Han's Laser Techn…

36
Hiwin Mikrosystem

36
Hopto

36
Hahn-schickard-ge…

36
Helmerich & Payne

36
Humanetics Innova…

36
Huntleigh Technol…

36
Hunan University… ◀

36

What this shows Hunan holds 36 patents at rank #8,820, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Hunan

By rank, the assignees closest to #8,820 in granted patent volume.

Leaders in E21B (Earth OR Rock Drilling)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Hunan, neither rank-band nor same-CPC leaders (those blocks stay above). In E21B (Earth OR Rock Drilling), Hunan ranks #341 of 1,363 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (49 here).

Suez International 49 Universidade DE Santiago DE Compostela 49 Haldex Brake Products Aktiebolag 49 APR Beauty Group Inc. 49

Hunan's Innovation Score vs. every tracked assignee

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

49 Top 16% higher than 84% 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

Hunan University OF Science AND Technology patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2020	4	11.1%
2021	10	27.8%
2022	7	19.4%
2023	10	27.8%
2024	4	11.1%
2025partial year	1	2.8%

Which technologies does Hunan University OF Science AND Technology patent most?

E21B - Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells 11

G06F - Electric Digital Data Processing 5

H02P - Control OR Regulation OF Electric Motors, Electric Generators OR Dynamo-electric CONVERTERS; Controlling Transformers, Reactors OR Choke Coils 4

G01V - GEOPHYSICS; Gravitational MEASUREMENTS; Detecting Masses OR OBJECTS; Tags 4

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 4

H02K - Dynamo-electric Machines 3

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

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 2

H02M - Apparatus FOR Conversion Between AC AND AC, Between AC AND DC, OR Between DC AND DC, AND FOR USE With Mains OR Similar Power Supply SYSTEMS; Conversion OF DC OR AC Input Power Into Surge Output POWER; Control OR Regulation Thereof 2

Y02A - Technologies FOR Adaptation TO Climate Change 2

G01R - Measuring Electric VARIABLES; Measuring Magnetic Variables 2

H02J - Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy 2

D21H - Pulp COMPOSITIONS; Preparation Thereof NOT Covered BY Subclasses D21c OR D21D; Impregnating OR Coating OF PAPER; Treatment OF Finished Paper NOT Covered BY Class B31 OR Subclass D21G; Paper NOT Otherwise Provided FOR 2

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 2

C08L - Compositions OF Macromolecular Compounds 2

Top 15 of 38 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

Hunan University OF Science AND Technology's patent record in context - here's where to go next.

Hunan University OF Science AND Technology's lead technology class is E21B (Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells), 30.6% of its portfolio - see every assignee active in that class. Explore E21B
Ranked #8,824 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Hunan University OF Science AND Technology against Hamilton Associates, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 48.8/100 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.