Where does Corner Star Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Corner Star Limited ranks #10,294 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 Corner Star Limited hold?

Corner Star Limited holds 30 US utility patents granted between 2017 and 2021, spanning 17 technology areas.

What is Corner Star Limited's Innovation Score?

Corner Star Limited has an Innovation Score of 38.0 out of 100 (top 42% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Corner Star Limited's patent grant rate increasing or decreasing?

Corner Star Limited's recent grant velocity is -85% 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 Corner Star Limited's patents?

Corner Star Limited's patents average 19.2 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 Corner Star Limited 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

Corner Star Limited

Q: What technology areas does Corner Star Limited focus on?

Corner Star Limited's top technology area is C30B (Single-crystal Growth ; Unidirectional Solidification OF Eutectic Material OR Unidirectional Demixing OF Eutectoid MATERIAL; Refining BY Zone-melting OF Material ; Production OF A Homogeneous Polycrystalline Material With Defined Structure ; Single Crystals OR Homogeneous Polycrystalline Material WI) with 16 patents, ranking #34 of 414 assignees active in that subclass. Grants appear in 17 CPC subclasses total.

USPTO PatentsView assignee record - 30 granted patents across 17 technology areas, recorded in grant years 2017–2021. 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: C30B (Single-crystal Growth ; Unidirectional Solidification OF Eutectic Material OR Unidirectional Demixing OF Eutectoid MATERIAL; Refining BY Zone-melting OF Material ; Production OF A Homogeneous Polycrys).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Corner ranks #10,294 of 49,997 tracked US assignees by granted-patent volume, with 30 patents across 17 technology areas.

#10,294
of 49,997 US assignees by volume: Top 42%
by Innovation Score (38.0/100): 19.2
avg claims per patent: -85%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R10294 · Foreign Corporation #10,294 · 30 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-RICH · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-SMALL 30 grants
UPPER-Q #10,294/49,997
PHOTO-FINISH ConXtech
CPC-FOCUS C30B · 17 areas
INNOV-THIN 38.0/100
CLAIMS-RICH 19.2 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -85% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: ConXtech, Inc. (±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 Corner’s 38.0 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 11.9 pts (31%) Velocity 0.0 pts (0%) Breadth 14.6 pts (38%) Claim depth 11.5 pts (30%)

Qualcomm Incorporated · highest

85
Corner Star · this assignee

38
Puff · near

38
Sango · near

38
Tokyo Parts Industrial · near

38
Travel Caddy · near

38
3D Lighting… · lowest

7

What this shows Corner's Innovation Score is 38.0/100 (top 42% 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 Corner?

Each dot is one of Corner’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). Corner’s own 19.2 claims/patent is ABOVE the 17.3 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Corner's grants concentrate

Corner Star Limited is a focused PatentsView assignee: 17 CPC subclasses with 53.3% of grants classified under C30B (Single-crystal Growth ; Unidirectional Solidification OF Eutectic Material OR Unidirectional Demixing OF Eutectoid MATERIAL; Refining BY Zone-melting OF Material ; Production OF A Homogeneous Polycrys). Peak complete grant year is 2019 (13 grants) versus a trough of 2 in 2020. By volume, Corner sits between ConXtech, Inc. and Dayco Europe S.R.L..

Conxtech

30
Copan Italia S p A

30
Copeland Comfort…

30
Cornami

30
Crestovo Holdings

30
Cue Biopharma

30
Cummins Enterprise

30
Dayco Europe S R L

30
Corner Star ◀

30

What this shows Corner holds 30 patents at rank #10,297, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Corner

By rank, the assignees closest to #10,297 in granted patent volume.

Leaders in C30B (Single-crystal Growth)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Corner, neither rank-band nor same-CPC leaders (those blocks stay above). In C30B (Single-crystal Growth), Corner ranks #34 of 414 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (38 here).

Puff Corporation 38 Tokyo Parts Industrial Co., Ltd. 38 Travel Caddy, Inc. 38 Sango Co., Ltd. 38

Corner's Innovation Score vs. every tracked assignee

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

38 Top 42% higher than 58% 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 · 2017–2021

Grants by year

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

View data table

Corner Star Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2017	3	10.0%
2018	10	33.3%
2019	13	43.3%
2020	2	6.7%
2021	2	6.7%

Which technologies does Corner Star Limited patent most?

C30B - Single-crystal Growth ; Unidirectional Solidification OF Eutectic Material OR Unidirectional Demixing OF Eutectoid MATERIAL; Refining BY Zone-melting OF Material ; Production OF A Homogeneous Polycrystalline Material With Defined Structure ; Single Crystals OR Homogeneous Polycrystalline Material WI 16

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 11

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 9

Y10T - Technical Subjects Covered BY Former US Classification 7

B01D - Separation 4

B28D - Working Stone OR Stone-like Materials 2

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

B24B - Machines, Devices, OR Processes FOR Grinding OR Polishing ; Dressing OR Conditioning OF Abrading SURFACES; Feeding OF Grinding, Polishing, OR Lapping Agents 1

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 1

H10F - Inorganic Semiconductor Devices Sensitive TO Infrared Radiation, Light, Electromagnetic Radiation OF Shorter Wavelength OR Corpuscular Radiation 1

C23C - Coating Metallic MATERIAL; Coating Material With Metallic MATERIAL; Surface Treatment OF Metallic Material BY Diffusion Into THE Surface, BY Chemical Conversion OR SUBSTITUTION; Coating BY Vacuum Evaporation, BY Sputtering, BY ION Implantation OR BY Chemical Vapour Deposition, IN General 1

F23C - Methods OR Apparatus FOR Combustion Using Fluid Fuel OR Solid Fuel Suspended IN ; A Carrier GAS OR; AIR 1

F16J - Pistons ; CYLINDERS; Sealings 1

B23D - PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; Like Operations FOR Working Metal BY Removing Material, NOT Otherwise Provided FOR 1

G05D - Systems FOR Controlling OR Regulating Non-electric Variables 1

Top 15 of 17 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

Corner Star Limited's patent record in context - here's where to go next.

Corner Star Limited's lead technology class is C30B (Single-crystal Growth ; Unidirectional Solidification OF Eutectic Material OR Unidirectional Demixing OF Eutectoid MATERIAL; Refining BY Zone-melting OF Material ; Production OF A Homogeneous Polycrys), 53.3% of its portfolio - see every assignee active in that class. Explore C30B
Ranked #10,294 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Corner Star Limited against ConXtech, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 38.0/100 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.