Where does Tokai Carbon Korea Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Tokai Carbon Korea Co., Ltd. ranks #15,006 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 Tokai Carbon Korea Co., Ltd. hold?

Tokai Carbon Korea Co., Ltd. holds 20 US utility patents granted between 2018 and 2025, spanning 17 technology areas.

What is Tokai Carbon Korea Co., Ltd.'s Innovation Score?

Tokai Carbon Korea Co., Ltd. has an Innovation Score of 48.5 out of 100 (top 16% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Tokai Carbon Korea Co., Ltd.'s patent grant rate increasing or decreasing?

Tokai Carbon Korea Co., Ltd.'s recent grant velocity is +1700% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Tokai Carbon Korea Co., Ltd.'s patents?

Tokai Carbon Korea Co., Ltd.'s patents average 10.2 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 Tokai Carbon Korea 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

Tokai Carbon Korea Co., Ltd.

Q: What technology areas does Tokai Carbon Korea Co., Ltd. focus on?

Tokai Carbon Korea Co., Ltd.'s top technology area is 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) with 12 patents. Grants appear in 17 CPC subclasses total.

USPTO PatentsView assignee record - 20 granted patents across 17 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: 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 Evap).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Tokai ranks #15,006 of 49,997 tracked US assignees by granted-patent volume, with 20 patents across 17 technology areas.

#15,006
of 49,997 US assignees by volume: Top 16%
by Innovation Score (48.5/100): 10.2
avg claims per patent: +1700%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R15006 · Foreign Corporation #15,006 · 20 grants

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

GRANTS-SMALL 20 grants
MID-PACK #15,006/49,997
PHOTO-FINISH The United States…
CPC-FOCUS C23C · 17 areas
INNOV-PAR 48.5/100
CLAIMS-PAR 10.2 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +1700% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: The United States of America as represented by the Secretary of the Department of Health and Human Services, Centers for Disease Control and Prevention (±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.

Qualcomm Incorporated · highest

85
Tokai Carbon Korea · this assignee

49
3D Lighting… · lowest

7

What this shows Tokai's Innovation Score is 48.5/100 (top 16% 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.

Where Tokai's grants concentrate

Tokai Carbon Korea Co., Ltd. is a focused PatentsView assignee: 17 CPC subclasses with 60% of grants classified under 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 Evap). Peak complete grant year is 2023 (6 grants) versus a trough of 1 in 2018. By volume, Tokai sits between The United States of America as represented by the Secretary of the Department of Health and Human Services, Centers for Disease Control and Prevention and Transphorm Japan, Inc..

Tokai's three-year grant acceleration

Tokai Carbon Korea Co., Ltd. shows 13 grants in 2022–2024 against only 5 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.

The United States…

20
Thync Global

20
Tigerconnect

20
Todolivo S L

20
Toly Management

20
Trackthings

20
Trackingpoint

20
Transphorm Japan

20
Tokai Carbon Korea ◀

20

What this shows Tokai holds 20 patents at rank #15,007, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Tokai

By rank, the assignees closest to #15,007 in granted patent volume.

Leaders in C23C (Coating Metallic Material)

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

Tokai's Innovation Score vs. every tracked assignee

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

49 Top 16% higher than 84% 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

Tokai Carbon Korea Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	1	5.0%
2020	1	5.0%
2021	4	20.0%
2022	5	25.0%
2023	6	30.0%
2024	2	10.0%
2025partial year	1	5.0%

Which technologies does Tokai Carbon Korea Co., Ltd. patent most?

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 12

C04B - Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone 8

H01L - Semiconductor Devices NOT Covered BY Class H10 7

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

C01P - Indexing Scheme Relating TO Structural AND Physical Aspects OF Solid Inorganic Compounds 5

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 4

H01J - Electric Discharge Tubes OR Discharge Lamps 3

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 2

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 2

B32B - Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form 1

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 1

B82B - Nanostructures Formed BY Manipulation OF Individual Atoms, Molecules, OR Limited Collections OF Atoms OR Molecules AS Discrete UNITS; Manufacture OR Treatment Thereof 1

H01B - CABLES; CONDUCTORS; INSULATORS; Selection OF Materials FOR Their Conductive, Insulating OR Dielectric Properties 1

H01G - CAPACITORS; Capacitors, Rectifiers, Detectors, Switching Devices, Light-sensitive OR Temperature-sensitive Devices OF THE Electrolytic Type 1

H10D - Inorganic Electric Semiconductor Devices 1

Top 15 of 17 technology areas

Where it ranks

Overall rank by patents

#15,006

of 49,997 tracked assignees

Innovation Score

48.5 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

What to do with this data

Tokai Carbon Korea Co., Ltd.'s patent record in context - here's where to go next.

Tokai Carbon Korea Co., Ltd.'s lead technology class is 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 Evap), 60% of its portfolio - see every assignee active in that class. Explore C23C
Ranked #15,006 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Tokai Carbon Korea Co., Ltd. against The United States of America as represented by the Secretary of the Department of Health and Human Services, Centers for Disease Control and Prevention, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 48.5/100 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.