Where does Changs Ascending Enterprise Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Changs Ascending Enterprise Co., Ltd. ranks #13,354 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 Changs Ascending Enterprise Co., Ltd. hold?

Changs Ascending Enterprise Co., Ltd. holds 22 US utility patents granted between 2015 and 2023, spanning 16 technology areas.

What is Changs Ascending Enterprise Co., Ltd.'s Innovation Score?

Changs Ascending Enterprise Co., Ltd. has an Innovation Score of 31.7 out of 100 (39th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Changs Ascending Enterprise Co., Ltd.'s patent grant rate increasing or decreasing?

Changs Ascending Enterprise Co., Ltd.'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 Changs Ascending Enterprise Co., Ltd.'s patents?

Changs Ascending Enterprise Co., Ltd.'s patents average 9.7 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 Changs Ascending Enterprise Co., Ltd. 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

Changs Ascending Enterprise Co., Ltd.

Q: What technology areas does Changs Ascending Enterprise Co., Ltd. focus on?

Changs Ascending Enterprise Co., Ltd.'s top technology area is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution) with 17 patents, ranking #810 of 5,963 assignees active in that subclass. Grants appear in 16 CPC subclasses total.

USPTO PatentsView assignee record - 22 granted patents across 16 technology areas, recorded in grant years 2015–2023. 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: Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Changs ranks #13,354 of 49,997 tracked US assignees by granted-patent volume, with 22 patents across 16 technology areas.

#13,354
of 49,997 US assignees by volume: 39th percentile
by Innovation Score (31.7/100): 9.7
avg claims per patent: -71%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R13354 · Foreign Corporation #13,354 · 22 grants

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

GRANTS-SMALL 22 grants
MID-PACK #13,354/49,997
PHOTO-FINISH Cast
CPC-FOCUS Y02E · 16 areas
INNOV-THIN 31.7/100
CLAIMS-PAR 9.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -71% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Cast 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 Changs’s 31.7 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 10.8 pts (34%) Velocity 1.0 pts (3%) Breadth 14.1 pts (44%) Claim depth 5.8 pts (18%)

Qualcomm Incorporated · highest

85
Changs Ascending… · this assignee

32
3D Lighting… · lowest

7

What this shows Changs's Innovation Score is 31.7/100 (39th 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 Changs?

Each dot is one of Changs’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). Changs’s own 9.7 claims/patent is at or below the 13.9 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Changs's grants concentrate

Changs Ascending Enterprise Co., Ltd. is a focused PatentsView assignee: 16 CPC subclasses with 77.3% of grants classified under Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution). Peak complete grant year is 2016 (5 grants) versus a trough of 1 in 2021. By volume, Changs sits between Cast Co., Ltd. and Concraft Holding Co., Ltd..

Changs's three-year grant acceleration

Changs Ascending Enterprise Co., Ltd. shows 1 grants in 2022–2024 against only 7 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.

Cast

22
Cefla Societa' Co…

22
Celloptic

22
CF Traverse

22
Chassis Brakes In…

22
Chevron Oronite T…

22
Clariant Producti…

22
Concraft Holding

22
Changs Ascending… ◀

22

What this shows Changs holds 22 patents at rank #13,348, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Changs

By rank, the assignees closest to #13,348 in granted patent volume.

Leaders in Y02E (Reduction OF Greenhouse GAS [GHG] Emissions)

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

Changs's Innovation Score vs. every tracked assignee

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

32 39th percentile higher than 39% 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 · 2015–2023

Grants by year

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

View data table

Changs Ascending Enterprise Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	4	18.2%
2016	5	22.7%
2017	3	13.6%
2018	2	9.1%
2019	3	13.6%
2020	3	13.6%
2021	1	4.5%
2023	1	4.5%

Which technologies does Changs Ascending Enterprise Co., Ltd. patent most?

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 17

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 16

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 6

H02J - Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy 4

C01P - Indexing Scheme Relating TO Structural AND Physical Aspects OF Solid Inorganic Compounds 3

C01D - Compounds OF Alkali Metals, i.e. Lithium, Sodium, Potassium, Rubidium, Caesium, OR Francium 3

C22B - Production AND Refining OF Metals ; Pretreatment OF RAW Materials 3

Y02T - Climate Change Mitigation Technologies Related TO Transportation 3

B60L - Propulsion OF Electrically-propelled Vehicles ; Supplying Electric Power FOR Auxiliary Equipment OF Electrically-propelled Vehicles ; Electrodynamic Brake Systems FOR Vehicles IN General ; Magnetic Suspension OR Levitation FOR VEHICLES; Monitoring Operating Variables OF Electrically-propelled Vehicl 3

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 3

G01R - Measuring Electric VARIABLES; Measuring Magnetic Variables 2

H04B - Transmission 1

B05C - Apparatus FOR Applying Fluent Materials TO Surfaces, IN General 1

B82Y - Specific Uses OR Applications OF NANOSTRUCTURES; Measurement OR Analysis OF NANOSTRUCTURES; Manufacture OR Treatment OF Nanostructures 1

C04B - Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone 1

Top 15 of 16 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

Changs Ascending Enterprise Co., Ltd.'s patent record in context - here's where to go next.

Changs Ascending Enterprise Co., Ltd.'s lead technology class is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution), 77.3% of its portfolio - see every assignee active in that class. Explore Y02E
Ranked #13,354 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Changs Ascending Enterprise Co., Ltd. against Cast Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 31.7/100 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.