Where does Hunan University rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Hunan University ranks #8,044 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 hold?

Hunan University holds 40 US utility patents granted between 2017 and 2025, spanning 44 technology areas.

What is Hunan University's Innovation Score?

Hunan University has an Innovation Score of 58.9 out of 100 (top 4% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Hunan University's patent grant rate increasing or decreasing?

Hunan University's recent grant velocity is +200% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Hunan University's patents?

Hunan University's patents average 9.9 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 Hunan University 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

Hunan University

Q: What technology areas does Hunan University focus on?

Hunan University's top technology area is H02J (Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy) with 12 patents, ranking #448 of 3,143 assignees active in that subclass. Grants appear in 44 CPC subclasses total.

USPTO PatentsView assignee record - 40 granted patents across 44 technology areas, recorded in grant years 2017–2025. 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: H02J (Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Hunan ranks #8,044 of 49,997 tracked US assignees by granted-patent volume, with 40 patents across 44 technology areas.

#8,044
of 49,997 US assignees by volume: Top 4%
by Innovation Score (58.9/100): 9.9
avg claims per patent: +200%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R8044 · Foreign Corporation #8,044 · 40 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-WIDE · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-SMALL 40 grants
UPPER-Q #8,044/49,997
PHOTO-FINISH Hangzhou Zero Zero…
CPC-WIDE H02J · 44 areas
INNOV-PAR 58.9/100
CLAIMS-PAR 9.9 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +200% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Hangzhou Zero Zero Technology 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 Hunan’s 58.9 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 12.8 pts (22%) Velocity 16.7 pts (28%) Breadth 23.5 pts (40%) Claim depth 5.9 pts (10%)

Qualcomm Incorporated · highest

85
Danmarks Tekniske… · near

59
Chung ANG University… · near

59
Hunan University · this assignee

59
Tonal Systems · near

59
ChemImage · near

59
3D Lighting… · lowest

7

What this shows Hunan's Innovation Score is 58.9/100 (top 4% 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 9.9 claims/patent is at or below the 15.3 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 is a focused PatentsView assignee: 44 CPC subclasses with 30% of grants classified under H02J (Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy). Peak complete grant year is 2023 (6 grants) versus a trough of 1 in 2017. By volume, Hunan sits between Hangzhou Zero Zero Technology Co., Ltd. and IlluminOss Medical, Inc..

Hunan's three-year grant acceleration

Hunan University shows 15 grants in 2022–2024 against only 6 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.

Hangzhou Zero Zer…

40
Heraeus Noblelight

40
HZO

40
Holland

40
IKA—Werke & KG

40
Innomotics

40
Icron

40
Illuminoss Medical

40
Hunan University ◀

40

What this shows Hunan holds 40 patents at rank #8,045, 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 #8,045 in granted patent volume.

Leaders in H02J (Circuit Arrangements OR Systems FOR Supplying OR Distribu…)

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 H02J (Circuit Arrangements OR Systems FOR Supplying OR Distribu…), Hunan ranks #448 of 3,143 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (59 here).

Tonal Systems, Inc. 59 Chung ANG University Industry Academic Cooperation Foundation 59 ChemImage Corporation 59 Danmarks Tekniske Universitet 59

Hunan's Innovation Score vs. every tracked assignee

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

59 Top 4% higher than 96% 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 · 2017–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2017–2019 baseline. Full figures in the table below.

View data table

Hunan University patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2017	1	2.5%
2018	2	5.0%
2019	3	7.5%
2020	2	5.0%
2021	1	2.5%
2022	3	7.5%
2023	6	15.0%
2024	6	15.0%
2025partial year	16	40.0%

Which technologies does Hunan University patent most?

H02J - Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy 12

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 9

G05B - Control OR Regulating Systems IN GENERAL; Functional Elements OF Such SYSTEMS; Monitoring OR Testing Arrangements FOR Such Systems OR Elements 5

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 5

G01R - Measuring Electric VARIABLES; Measuring Magnetic Variables 4

B25J - MANIPULATORS; Chambers Provided With Manipulation Devices 3

G06T - Image Data Processing OR Generation, IN General 3

H01F - MAGNETS; INDUCTANCES; TRANSFORMERS; Selection OF Materials FOR Their Magnetic Properties 3

G06N - Computing Arrangements Based ON Specific Computational Models 2

A61P - Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations 2

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 2

G05D - Systems FOR Controlling OR Regulating Non-electric Variables 2

H04L - Transmission OF Digital Information, e.g. Telegraphic Communication 2

Y04S - Systems Integrating Technologies Related TO Power Network Operation, Communication OR Information Technologies FOR Improving THE Electrical Power Generation, Transmission, Distribution, Management OR Usage, i.e. Smart Grids 2

H02S - Generation OF Electric Power BY Conversion OF Infrared Radiation, Visible Light OR Ultraviolet Light, e.g. Using Photovoltaic [PV] Modules 2

Top 15 of 44 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's patent record in context - here's where to go next.

Hunan University's lead technology class is H02J (Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy), 30% of its portfolio - see every assignee active in that class. Explore H02J
Ranked #8,044 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Hunan University against Hangzhou Zero Zero Technology Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 58.9/100 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.