Where does Chang Gung Biotechnology Corp. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Chang Gung Biotechnology Corp. ranks #28,383 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 Chang Gung Biotechnology Corp. hold?

Chang Gung Biotechnology Corp. holds 9 US utility patents granted between 2017 and 2018, spanning 3 technology areas.

What is Chang Gung Biotechnology Corp.'s Innovation Score?

Chang Gung Biotechnology Corp. has an Innovation Score of 18.9 out of 100 (5th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Chang Gung Biotechnology Corp. focus on?

Chang Gung Biotechnology Corp.'s top technology area is A61P (Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations) with 9 patents, ranking #2,057 of 6,058 assignees active in that subclass. Grants appear in 3 CPC subclasses total.

Is Chang Gung Biotechnology Corp.'s patent grant rate increasing or decreasing?

Chang Gung Biotechnology Corp.'s recent grant velocity is -100% 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 Chang Gung Biotechnology Corp.'s patents?

Chang Gung Biotechnology Corp.'s patents average 8.0 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 Chang Gung Biotechnology Corp. 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

Chang Gung Biotechnology Corp.

USPTO PatentsView assignee record - 9 granted patents across 3 technology areas, recorded in grant years 2017–2018. 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: A61P (Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Chang ranks #28,383 of 49,997 tracked US assignees by granted-patent volume, with 9 patents across 3 technology areas.

#28,383
of 49,997 US assignees by volume: 5th percentile
by Innovation Score (18.9/100): 8.0
avg claims per patent: -100%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R28383 · Foreign Corporation #28,383 · 9 grants

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

GRANTS-MICRO 9 grants
MID-PACK #28,383/49,997
PHOTO-FINISH Centre Scientifique…
CPC-NARROW A61P · 3 areas
INNOV-LOW 18.9/100
CLAIMS-PAR 8.0 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -100% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Centre Scientifique ET Technique DU BÂTIMENT (CSTB) (±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 Chang’s 18.9 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 8.0 pts (42%) Velocity 0.0 pts (0%) Breadth 6.1 pts (32%) Claim depth 4.8 pts (25%)

Qualcomm Incorporated · highest

85
Chang Gung Biotechno… · this assignee

19
3D Lighting… · lowest

7

What this shows Chang's Innovation Score is 18.9/100 (5th 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 Chang?

Each dot is one of Chang’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). Chang’s own 8.0 claims/patent is at or below the 10.3 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Chang's grants concentrate

Chang Gung Biotechnology Corp. is a focused PatentsView assignee: 3 CPC subclasses with 100% of grants classified under A61P (Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations). Peak complete grant year is 2017 (6 grants) versus a trough of 3 in 2018. By volume, Chang sits between Centre Scientifique ET Technique DU BÂTIMENT (CSTB) and Channel Well Technology Co., Ltd..

Centre Scientifiq…

9
Cerego Japan

9
Cevec Pharmaceuti…

9
Chameleon Holding

9
Changzhou Canbo T…

9
Changzhou Institu…

9
Changzhou Shine S…

9
Channel Well Tech…

9
Chang Gung Biotec… ◀

9

What this shows Chang holds 9 patents at rank #28,349, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Chang

By rank, the assignees closest to #28,349 in granted patent volume.

Leaders in A61P (Specific Therapeutic Activity OF Chemical Compounds OR Me…)

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

Chang's Innovation Score vs. every tracked assignee

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

19 5th percentile higher than 5% 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 · 2017–2018

Grants by year

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

View data table

Chang Gung Biotechnology Corp. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2017	6	66.7%
2018	3	33.3%

Which technologies does Chang Gung Biotechnology Corp. patent most?

A61P - Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations 9

A61K - Preparations FOR Medical, Dental OR Toiletry Purposes 9

C08B - POLYSACCHARIDES; Derivatives Thereof 5

Top 3 of 3 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

Chang Gung Biotechnology Corp.'s patent record in context - here's where to go next.

Chang Gung Biotechnology Corp.'s lead technology class is A61P (Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations), 100% of its portfolio - see every assignee active in that class. Explore A61P
Ranked #28,383 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Chang Gung Biotechnology Corp. against Centre Scientifique ET Technique DU BÂTIMENT (CSTB), an assignee filing at a similar volume. Compare portfolios
Innovation Score of 18.9/100 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.