Where does Iljin Materials Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Iljin Materials Co., Ltd. ranks #15,362 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 Iljin Materials Co., Ltd. hold?

Iljin Materials Co., Ltd. holds 19 US utility patents granted between 2018 and 2023, spanning 14 technology areas.

What is Iljin Materials Co., Ltd.'s Innovation Score?

Iljin Materials Co., Ltd. has an Innovation Score of 32.2 out of 100 (40th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Iljin Materials Co., Ltd.'s patent grant rate increasing or decreasing?

Iljin Materials Co., Ltd.'s recent grant velocity is +433% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Iljin Materials Co., Ltd.'s patents?

Iljin Materials Co., Ltd.'s patents average 7.7 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 Iljin Materials 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

Iljin Materials Co., Ltd.

Q: What technology areas does Iljin Materials Co., Ltd. focus on?

Iljin Materials Co., Ltd.'s top technology area is C25D (Processes FOR THE Electrolytic OR Electrophoretic Production OF COATINGS; ELECTROFORMING; Apparatus Therefor) with 16 patents, ranking #28 of 477 assignees active in that subclass. Grants appear in 14 CPC subclasses total.

USPTO PatentsView assignee record - 19 granted patents across 14 technology areas, recorded in grant years 2018–2023. 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: C25D (Processes FOR THE Electrolytic OR Electrophoretic Production OF COATINGS; ELECTROFORMING; Apparatus Therefor).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Iljin ranks #15,362 of 49,997 tracked US assignees by granted-patent volume, with 19 patents across 14 technology areas.

#15,362
of 49,997 US assignees by volume: 40th percentile
by Innovation Score (32.2/100): 7.7
avg claims per patent: +433%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R15362 · Foreign Corporation #15,362 · 19 grants

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

GRANTS-MICRO 19 grants
MID-PACK #15,362/49,997
PHOTO-FINISH I Peace
CPC-FOCUS C25D · 14 areas
INNOV-THIN 32.2/100
CLAIMS-SPARSE 7.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +433% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: I Peace, 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 Iljin’s 32.2 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 10.3 pts (32%) Velocity 4.0 pts (12%) Breadth 13.2 pts (41%) Claim depth 4.6 pts (14%)

Qualcomm Incorporated · highest

85
Iljin Materials · this assignee

32
3D Lighting… · lowest

7

What this shows Iljin's Innovation Score is 32.2/100 (40th 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 Iljin?

Each dot is one of Iljin’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). Iljin’s own 7.7 claims/patent is at or below the 13.2 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Iljin's grants concentrate

Iljin Materials Co., Ltd. is a focused PatentsView assignee: 14 CPC subclasses with 84.2% of grants classified under C25D (Processes FOR THE Electrolytic OR Electrophoretic Production OF COATINGS; ELECTROFORMING; Apparatus Therefor). Peak complete grant year is 2021 (7 grants) versus a trough of 3 in 2018. By volume, Iljin sits between I Peace, Inc. and Innovative Technology Limited.

Iljin's three-year grant acceleration

Iljin Materials Co., Ltd. shows 6 grants in 2022–2024 against only 10 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.

I Peace

19
I D E

19
I G B S R L

19
Icon Aircraft

19
Imerys Graphite &…

19
Infinity X1

19
Infobionic

19
Innovative Techno…

19
Iljin Materials ◀

19

What this shows Iljin holds 19 patents at rank #15,359, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Iljin

By rank, the assignees closest to #15,359 in granted patent volume.

Leaders in C25D (Processes FOR THE Electrolytic OR Electrophoretic Product…)

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

Iljin's Innovation Score vs. every tracked assignee

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

32 40th percentile higher than 40% 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 · 2018–2023

Grants by year

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

View data table

Iljin Materials Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	3	15.8%
2020	3	15.8%
2021	7	36.8%
2022	3	15.8%
2023	3	15.8%

Which technologies does Iljin Materials Co., Ltd. patent most?

C25D - Processes FOR THE Electrolytic OR Electrophoretic Production OF COATINGS; ELECTROFORMING; Apparatus Therefor 16

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 15

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 15

H05K - Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components 7

Y10T - Technical Subjects Covered BY Former US Classification 7

C22C - Alloys 7

B32B - Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form 3

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 2

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 2

B82Y - Specific Uses OR Applications OF NANOSTRUCTURES; Measurement OR Analysis OF NANOSTRUCTURES; Manufacture OR Treatment OF Nanostructures 2

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

H01L - Semiconductor Devices NOT Covered BY Class H10 1

C22F - Changing THE Physical Structure OF Non-ferrous Metals AND Non-ferrous Alloys 1

Top 14 of 14 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

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

Iljin Materials Co., Ltd.'s lead technology class is C25D (Processes FOR THE Electrolytic OR Electrophoretic Production OF COATINGS; ELECTROFORMING; Apparatus Therefor), 84.2% of its portfolio - see every assignee active in that class. Explore C25D
Ranked #15,362 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Iljin Materials Co., Ltd. against I Peace, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 32.2/100 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.