Where does Chuo University rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Chuo University ranks #26,000 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 Chuo University hold?

Chuo University holds 10 US utility patents granted between 2015 and 2025, spanning 13 technology areas.

What is Chuo University's Innovation Score?

Chuo University has an Innovation Score of 30.2 out of 100 (34th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

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

Chuo University's recent grant velocity is -71% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

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

Chuo University's patents average 9.8 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 Chuo 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

Chuo University

Q: What technology areas does Chuo University focus on?

Chuo University's top technology area is C12N (Microorganisms OR ENZYMES; Compositions THEREOF; Propagating, Preserving, OR Maintaining MICROORGANISMS; Mutation OR Genetic ENGINEERING; Culture Media) with 2 patents, ranking #2,832 of 4,144 assignees active in that subclass. Grants appear in 13 CPC subclasses total.

USPTO PatentsView assignee record - 10 granted patents across 13 technology areas, recorded in grant years 2015–2025. 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: C12N (Microorganisms OR ENZYMES; Compositions THEREOF; Propagating, Preserving, OR Maintaining MICROORGANISMS; Mutation OR Genetic ENGINEERING; Culture Media).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Chuo ranks #26,000 of 49,997 tracked US assignees by granted-patent volume, with 10 patents across 13 technology areas.

#26,000
of 49,997 US assignees by volume: 34th percentile
by Innovation Score (30.2/100): 9.8
avg claims per patent: -71%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R26000 · Foreign Corporation #26,000 · 10 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-PAR · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 10 grants
MID-PACK #26,000/49,997
PHOTO-FINISH Chiscan Holdings
CPC-FOCUS C12N · 13 areas
INNOV-THIN 30.2/100
CLAIMS-PAR 9.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -71% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Chiscan Holdings, LLC (±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 Chuo’s 30.2 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 8.3 pts (27%) Velocity 3.3 pts (11%) Breadth 12.7 pts (42%) Claim depth 5.9 pts (20%)

Qualcomm Incorporated · highest

85
Chuo University · this assignee

30
3D Lighting… · lowest

7

What this shows Chuo's Innovation Score is 30.2/100 (34th 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 Chuo?

Each dot is one of Chuo’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). Chuo’s own 9.8 claims/patent is at or below the 17.1 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Chuo's grants concentrate

Chuo University is a focused PatentsView assignee: 13 CPC subclasses with 20% of grants classified under C12N (Microorganisms OR ENZYMES; Compositions THEREOF; Propagating, Preserving, OR Maintaining MICROORGANISMS; Mutation OR Genetic ENGINEERING; Culture Media). Peak complete grant year is 2017 (3 grants) versus a trough of 1 in 2015. By volume, Chuo sits between Chiscan Holdings, LLC and Cirrex Systems, LLC.

Chuo's three-year grant acceleration

Chuo University shows 1 grants in 2022–2024 against only 2 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.

Chiscan Holdings

10
Chol

10
Chromocell

10
CHS

10
Cicaboom S r L

10
Cinemo

10
Circle Internet F…

10
Cirrex Systems

10
Chuo University ◀

10

What this shows Chuo holds 10 patents at rank #25,969, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Chuo

By rank, the assignees closest to #25,969 in granted patent volume.

Leaders in C12N (Microorganisms OR Enzymes)

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

Chuo's Innovation Score vs. every tracked assignee

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

30 34th percentile higher than 34% 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 · 2015–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Chuo University patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	10.0%
2016	1	10.0%
2017	3	30.0%
2018	1	10.0%
2019	1	10.0%
2020	1	10.0%
2022	1	10.0%
2025partial year	1	10.0%

Which technologies does Chuo University patent most?

C12N - Microorganisms OR ENZYMES; Compositions THEREOF; Propagating, Preserving, OR Maintaining MICROORGANISMS; Mutation OR Genetic ENGINEERING; Culture Media 2

C12P - Fermentation OR Enzyme-using Processes TO Synthesise A Desired Chemical Compound OR Composition OR TO Separate Optical Isomers From A Racemic Mixture 2

G06F - Electric Digital Data Processing 2

G01L - Measuring Force, Stress, Torque, Work, Mechanical Power, Mechanical Efficiency, OR Fluid Pressure 2

A61B - DIAGNOSIS; SURGERY; Identification 2

F04B - Positive-displacement Machines FOR LIQUIDS; Pumps 1

C12M - Apparatus FOR Enzymology OR MICROBIOLOGY; Apparatus FOR Culturing Microorganisms FOR Producing Biomass, FOR Growing Cells OR FOR Obtaining Fermentation OR Metabolic Products, i.e. Bioreactors OR Fermenters 1

C12Y - Enzymes 1

G08B - Signalling OR Calling SYSTEMS; Order TELEGRAPHS; Alarm Systems 1

A61M - Devices FOR Introducing Media Into, OR Onto, THE Body ; Devices FOR Transducing Body Media OR FOR Taking Media From THE Body ; Devices FOR Producing OR Ending Sleep OR Stupor 1

H04R - Loudspeakers, Microphones, Gramophone Pick-ups OR Like Acoustic Electromechanical TRANSDUCERS; Deaf-aid SETS; Public Address Systems 1

Y02D - Climate Change Mitigation Technologies IN Information AND Communication Technologies [ICT], I.E. Information AND Communication Technologies Aiming AT THE Reduction OF Their OWN Energy USE 1

G11C - Static Stores 1

Top 13 of 13 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

Chuo University's patent record in context - here's where to go next.

Chuo University's lead technology class is C12N (Microorganisms OR ENZYMES; Compositions THEREOF; Propagating, Preserving, OR Maintaining MICROORGANISMS; Mutation OR Genetic ENGINEERING; Culture Media), 20% of its portfolio - see every assignee active in that class. Explore C12N
Ranked #26,000 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Chuo University against Chiscan Holdings, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 30.2/100 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.