PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Hunan University OF Science AND Technology

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).

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Hunan ranks #8,824 of 50,000 tracked US assignees by granted-patent volume, with 36 patents across 38 technology areas.

#8,824
of 50,000 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 #8,824/50,000
  • 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.

Innovation-score neighbourhood around Hunan

Lowest and highest poles plus nearest Innovation Score peers, not a full corpus board reprint.

score

What this shows Hunan University OF Science AND Technology stamps GRANTS-SMALL, UPPER-Q, PHOTO-FINISH, CPC-FOCUS, INNOV-PAR, CLAIMS-SPARSE, TYPE-FRNCORP, SPAN-YRS, BOOK-RICH. Volume places it #8,824 of 50,000; Innovation Score 48.8/100 sits in the top 16% of the PatentsView-derived corpus. Closest grant-volume peer on this plate is Hahn-schickard-gesellschaft Für Angewandte Forschung E. V. (±0 grants).

Source USPTO PatentsView, PlainPatent Innovation Score As of 2015–2025

Portfolio overview

Hunan University OF Science AND Technology has been granted 36 US utility patents between 2020 and 2025, placing Hunan University OF Science AND Technology at #8,824 of 50,000 across all assignees tracked by PlainPatent. This portfolio spans 38 distinct Cooperative Patent Classification (CPC) subclasses, averaging 7.5 claims per patent with primary concentration in E21B (EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS). As a Foreign Corporation, Hunan University OF Science AND Technology is one of the more focused assignees in the PatentsView dataset. By volume, Hunan sits between Hamilton Associates, Inc. (36 patents, rank #8,816) and Huntleigh Technology Limited (36 patents, rank #8,824) - the closest US assignees by grant volume. The composite Innovation Score of 48.8/100 blends portfolio volume, grant velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Grant cadence records the difference between two grant-year windows. Historical data spans 2020 through 2025, with 36 total grants over that period. Grant timing can lag the related application by years, so this comparison does not establish current R&D spending, strategic intent, or a company’s application activity. The Foreign Corporation classification provides context for the assignee record, not a conclusion about its business strategy.

Claim depth and technology breadth describe this aggregate record. Hunan University OF Science AND Technology's 7.5 average claims per patent is an average count, not a measure of claim scope, legal strength, enforceability, or design-around risk. The record spans 38 CPC subclasses. Combined with portfolio volume, these figures let readers compare the documented grant records of assignees in similar technology classes.

Who files at Hunan's volume?

Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀

patents

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.

Source USPTO PatentsView, granted utility patents As of 2015–2025

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).

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 50,000 US assignees

0–10: 687 US assignees (1%). Below this entry. 10–20: 2,527 US assignees (5%). Below this entry. 20–30: 13,162 US assignees (26%). Below this entry. 30–40: 15,294 US assignees (31%). Below this entry. 40–50: 11,491 US assignees (23%). This entry sits in this band. 50–60: 5,058 US assignees (10%). Above this entry. 60–70: 1,537 US assignees (3%). Above this entry. 70–80: 234 US assignees (0%). Above this entry. 80–90: 10 US assignees (0%). Above this entry. 90–100: 0 US assignees (0%). Above this entry. This assignee 0 100 every tracked assignee, bucketed by value

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

024681012 202020212022202320242025 1
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?

Top 15 of 38 technology areas

Where it ranks

Overall rank by patents

#8,824

of 50,000 tracked assignees

Innovation Score

48.8 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?
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

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.