Where does Kojundo Chemical Laboratory Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Kojundo Chemical Laboratory Co., Ltd. ranks #41,268 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 Kojundo Chemical Laboratory Co., Ltd. hold?

Kojundo Chemical Laboratory Co., Ltd. holds 6 US utility patents granted between 2020 and 2025, spanning 7 technology areas.

What is Kojundo Chemical Laboratory Co., Ltd.'s Innovation Score?

Kojundo Chemical Laboratory Co., Ltd. has an Innovation Score of 39.2 out of 100 (top 39% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Kojundo Chemical Laboratory Co., Ltd.'s patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for Kojundo Chemical Laboratory Co., Ltd..

What does claim depth mean for Kojundo Chemical Laboratory Co., Ltd.'s patents?

Kojundo Chemical Laboratory Co., Ltd.'s patents average 5.2 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 Kojundo Chemical Laboratory 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

Kojundo Chemical Laboratory Co., Ltd.

Q: What technology areas does Kojundo Chemical Laboratory Co., Ltd. focus on?

Kojundo Chemical Laboratory 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 6 patents, ranking #382 of 1,658 assignees active in that subclass. Grants appear in 7 CPC subclasses total.

USPTO PatentsView assignee record - 6 granted patents across 7 technology areas, recorded in grant years 2020–2025. 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, Kojundo ranks #41,268 of 49,997 tracked US assignees by granted-patent volume, with 6 patents across 7 technology areas.

#41,268
of 49,997 US assignees by volume: Top 39%
by Innovation Score (39.2/100): 5.2
avg claims per patent

USPTO PatentsView assignee plate

Corpus R41268 · Foreign Corporation #41,268 · 6 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 6 grants
LOWER-Q #41,268/49,997
PHOTO-FINISH Knorr-bremse…
CPC-NARROW C23C · 7 areas
INNOV-THIN 39.2/100
CLAIMS-SPARSE 5.2 claims/avg
TYPE-FRNCORP Foreign Corp
SPAN-YRS 2020–2025 · 6y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Knorr-bremse Commercial Vehicle Systems Japan 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 Kojundo’s 39.2 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 6.7 pts (17%) Velocity 20.0 pts (51%) Breadth 9.4 pts (24%) Claim depth 3.1 pts (8%)

Qualcomm Incorporated · highest

85
Kojundo Chemical… · this assignee

39
3D Lighting… · lowest

7

What this shows Kojundo's Innovation Score is 39.2/100 (top 39% 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 Kojundo?

Each dot is one of Kojundo’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). Kojundo’s own 5.2 claims/patent is at or below the 11.2 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Kojundo's grants concentrate

Kojundo Chemical Laboratory Co., Ltd. is a focused PatentsView assignee: 7 CPC subclasses with 100% 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 (4 grants) versus a trough of 1 in 2020. By volume, Kojundo sits between Knorr-bremse Commercial Vehicle Systems Japan Ltd. and Kolon Life Science, Inc..

Kojundo's three-year grant acceleration

Kojundo Chemical Laboratory Co., Ltd. shows 4 grants in 2022–2024 against only 1 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.

Knorr-bremse Comm…

6
Knowledge Initiat…

6
Koala Tech

6
KOC Solution

6
Kolbenschmidt Pie…

6
Kolo Medical

6
Kolon Global

6
Kolon Life Science

6
Kojundo Chemical… ◀

6

What this shows Kojundo holds 6 patents at rank #41,195, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Kojundo

By rank, the assignees closest to #41,195 in granted patent volume.

Leaders in C23C (Coating Metallic Material)

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

Kojundo's Innovation Score vs. every tracked assignee

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

39 Top 39% higher than 61% 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 · 2020–2025

Grants by year

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

View data table

Kojundo Chemical Laboratory Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2020	1	16.7%
2023	4	66.7%
2025partial year	1	16.7%

Which technologies does Kojundo Chemical Laboratory 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 6

C07F - Acyclic, Carbocyclic OR Heterocyclic Compounds Containing Elements Other Than Carbon, Hydrogen, Halogen, Oxygen, Nitrogen, Sulfur, Selenium OR Tellurium 3

H01L - Semiconductor Devices NOT Covered BY Class H10 3

C25F - Processes FOR THE Electrolytic Removal OF Materials From OBJECTS; Apparatus Therefor 2

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

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

C01G - Compounds Containing Metals NOT Covered BY Subclasses C01d OR C01f 1

Top 7 of 7 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

Kojundo Chemical Laboratory Co., Ltd.'s patent record in context - here's where to go next.

Kojundo Chemical Laboratory 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), 100% of its portfolio - see every assignee active in that class. Explore C23C
Ranked #41,268 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Kojundo Chemical Laboratory Co., Ltd. against Knorr-bremse Commercial Vehicle Systems Japan Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 39.2/100 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.