USPTO 2015–2025 USPTO PatentsView Foreign Corporation

SK Siltron Co., Ltd.

USPTO PatentsView assignee record - 79 granted patents across 25 technology areas, active 2018–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H01L (SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

11.0

Avg claims per patent

+159%

5-year filing velocity

The verdict

SK holds 79 US patents across 25 technology areas, rank #4,486 of 50,000 tracked assignees.

#4,486
of 50,000 US assignees by volume: Top 26%
by Innovation Score (44.4/100): 11.0
avg claims per patent: +159%
filing velocity, last 5 yrs

Portfolio overview

SK Siltron Co., Ltd. has been granted 79 US utility patents between 2018 and 2025, placing SK Siltron Co., Ltd. at rank #4,486 across all assignees tracked by PlainPatent. This portfolio spans 25 distinct Cooperative Patent Classification (CPC) subclasses, averaging 11.0 claims per patent with primary concentration in H01L (SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10). As a Foreign Corporation, SK Siltron Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, SK sits between Nantero, Inc. (79 patents, rank #4,482) and TE Connectivity Nederland BV (79 patents, rank #4,490) - the closest US assignees by grant volume. The composite Innovation Score of 44.4/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 57 grants, compared with 22 in the 2015–2019 window, a +159% shift in five-year velocity. An acceleration of this magnitude signals aggressive R&D investment and expanding technical ambition. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. SK Siltron Co., Ltd.'s 11.0 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 25 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark SK Siltron Co., Ltd. against peers pursuing similar technology classes.

Nantero

79
Powermat

79
Ruprecht - Karls…

79
Ranpak

79
SK ie technology

79
Savant Systems

79
Shifamed Holdings

79
TE Connectivity N…

79
SK Siltron ◀

79

What this shows SK holds 79 patents at rank #4,486, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near SK

By rank, the assignees closest to #4,486 in granted patent volume.

Leaders in H01L (Semiconductor Devices NOT Covered BY Class H10)

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

SK's Innovation Score vs. every tracked assignee

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

44 Top 26% higher than 74% of 50,000 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

SK Siltron Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	8	10.1%
2019	14	17.7%
2020	14	17.7%
2021	8	10.1%
2022	8	10.1%
2023	7	8.9%
2024	12	15.2%
2025	8	10.1%

Which technologies does SK Siltron Co., Ltd. patent most?

H01L - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 35

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 31

B24B - MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING ; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS 17

G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 10

B28D - WORKING STONE OR STONE-LIKE MATERIALS 6

G06T - IMAGE DATA PROCESSING OR GENERATION, IN GENERAL 5

B08B - CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL 5

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 5

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 5

H10D - INORGANIC ELECTRIC SEMICONDUCTOR DEVICES 5

G01B - MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS 4

B24D - TOOLS FOR GRINDING, BUFFING OR SHARPENING 3

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 3

B01D - SEPARATION 2

H10H - INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS 2

Top 15 of 25 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Accelerating

Where it ranks

Overall rank by patents

#4,486

Across all tracked assignees

Innovation Score

44.4 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does SK Siltron Co., Ltd. hold?

SK Siltron Co., Ltd. holds 79 US granted patents filed between 2018 and 2025, spanning 25 technology areas.

What is SK Siltron Co., Ltd.'s Innovation Score?

SK Siltron Co., Ltd. has an Innovation Score of 44.4 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does SK Siltron Co., Ltd. focus on?

SK Siltron Co., Ltd.'s top technology area is H01L (SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10) with 35 patents. The company has filed patents in 25 CPC subclasses total.

Is SK Siltron Co., Ltd.'s patent filing rate increasing or decreasing?

SK Siltron Co., Ltd.'s recent filing velocity is +159% compared to the prior five-year period. This indicates accelerating innovation.

What does claim depth mean for SK Siltron Co., Ltd.'s patents?

SK Siltron Co., Ltd.'s patents average 11.0 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the SK Siltron 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.

How to use this portfolio

SK's 79 grants land it in the top 26% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - SK ranks #4,486 of 50,000. Top 50 holders
Most of this portfolio concentrates in H01L - see who else leads that technology area. H01L leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

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 byPlainPatent Editorial, US Patent Intelligence Editorial Team · 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.