Where does DAE Chang Co., Ltd rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), DAE Chang Co., Ltd ranks #34,932 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 DAE Chang Co., Ltd hold?

DAE Chang Co., Ltd holds 7 US utility patents granted between 2018 and 2025, spanning 10 technology areas.

What is DAE Chang Co., Ltd's Innovation Score?

DAE Chang Co., Ltd has an Innovation Score of 26.9 out of 100 (22nd 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 DAE Chang Co., Ltd focus on?

DAE Chang Co., Ltd's top technology area is F25C (Producing, Working OR Handling ICE) with 5 patents, ranking #25 of 83 assignees active in that subclass. Grants appear in 10 CPC subclasses total.

Is DAE Chang Co., Ltd's patent grant rate increasing or decreasing?

DAE Chang Co., Ltd's recent grant velocity is -50% 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 DAE Chang Co., Ltd's patents?

DAE Chang Co., Ltd's patents average 14.3 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 DAE Chang 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

DAE Chang Co., Ltd

USPTO PatentsView assignee record - 7 granted patents across 10 technology areas, recorded in grant years 2018–2025. 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: F25C (Producing, Working OR Handling ICE).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, DAE ranks #34,932 of 49,997 tracked US assignees by granted-patent volume, with 7 patents across 10 technology areas.

#34,932
of 49,997 US assignees by volume: 22nd percentile
by Innovation Score (26.9/100): 14.3
avg claims per patent: -50%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R34932 · Foreign Corporation #34,932 · 7 grants

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

GRANTS-MICRO 7 grants
MID-PACK #34,932/49,997
PHOTO-FINISH Cytune Pharma
CPC-FOCUS F25C · 10 areas
INNOV-THIN 26.9/100
CLAIMS-RICH 14.3 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -50% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Cytune Pharma (±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 DAE’s 26.9 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 7.2 pts (27%) Velocity 0.0 pts (0%) Breadth 11.2 pts (41%) Claim depth 8.6 pts (32%)

Qualcomm Incorporated · highest

85
DAE Chang · this assignee

27
3D Lighting… · lowest

7

What this shows DAE's Innovation Score is 26.9/100 (22nd 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 DAE?

Each dot is one of DAE’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). DAE’s own 14.3 claims/patent is ABOVE the 9.6 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where DAE's grants concentrate

DAE Chang Co., Ltd is a focused PatentsView assignee: 10 CPC subclasses with 71.4% of grants classified under F25C (Producing, Working OR Handling ICE). Peak complete grant year is 2019 (3 grants) versus a trough of 1 in 2018. By volume, DAE sits between Cytune Pharma and Daeyeong E&B Co., Ltd..

Cytune Pharma

7
D R Nano

7
D F Omer

7
D3F

7
Daegu-gyeongbuk M…

7
Daejoo Precision…

7
Daekyeong Triple

7
Daeyeong E&B

7
DAE Chang ◀

7

What this shows DAE holds 7 patents at rank #34,928, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near DAE

By rank, the assignees closest to #34,928 in granted patent volume.

Leaders in F25C (Producing)

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

DAE's Innovation Score vs. every tracked assignee

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

27 22nd percentile higher than 22% 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 · 2018–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2018–2019 baseline. Full figures in the table below.

View data table

DAE Chang Co., Ltd patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	1	14.3%
2019	3	42.9%
2020	2	28.6%
2025partial year	1	14.3%

Which technologies does DAE Chang Co., Ltd patent most?

F25C - Producing, Working OR Handling ICE 5

H05B - Electric HEATING; Electric Light Sources NOT Otherwise Provided FOR; Circuit Arrangements FOR Electric Light Sources, IN General 2

B60N - Seats Specially Adapted FOR VEHICLES; Vehicle Passenger Accommodation NOT Otherwise Provided FOR 2

F25D - REFRIGERATORS; Cold ROOMS; ICE-BOXES; Cooling OR Freezing Apparatus NOT Otherwise Provided FOR 1

G01F - Measuring Volume, Volume Flow, Mass Flow OR Liquid LEVEL; Metering BY Volume 1

B60R - Vehicles, Vehicle Fittings, OR Vehicle Parts, NOT Otherwise Provided FOR 1

A47G - Household OR Table Equipment 1

F25B - Refrigeration Machines, Plants OR SYSTEMS; Combined Heating AND Refrigeration SYSTEMS; Heat Pump Systems 1

B65D - Containers FOR Storage OR Transport OF Articles OR Materials, e.g. Bags, Barrels, Bottles, Boxes, Cans, Cartons, Crates, Drums, Jars, Tanks, Hoppers, Forwarding CONTAINERS; Accessories, Closures, OR Fittings THEREFOR; Packaging ELEMENTS; Packages 1

B60H - Arrangements OF Heating, Cooling, Ventilating OR Other Air-treating Devices Specially Adapted FOR Passenger OR Goods Spaces OF Vehicles 1

Top 10 of 10 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

DAE Chang Co., Ltd's patent record in context - here's where to go next.

DAE Chang Co., Ltd's lead technology class is F25C (Producing, Working OR Handling ICE), 71.4% of its portfolio - see every assignee active in that class. Explore F25C
Ranked #34,932 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare DAE Chang Co., Ltd against Cytune Pharma, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 26.9/100 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.