Where does SK Siltron Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), SK Siltron Co., Ltd. ranks #4,489 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 SK Siltron Co., Ltd. hold?

SK Siltron Co., Ltd. holds 79 US utility patents granted 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 (top 26% of the corpus). This composite metric weighs portfolio volume (40%), grant 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, ranking #399 of 3,373 assignees active in that subclass. Grants appear in 25 CPC subclasses total.

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

SK Siltron Co., Ltd.'s recent grant velocity is +123% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

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 an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

SK Siltron Co., Ltd.

USPTO PatentsView assignee record - 79 granted patents across 25 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: H01L (Semiconductor Devices NOT Covered BY Class H10).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, SK ranks #4,489 of 49,997 tracked US assignees by granted-patent volume, with 79 patents across 25 technology areas.

#4,489
of 49,997 US assignees by volume: Top 26%
by Innovation Score (44.4/100): 11.0
avg claims per patent: +123%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R4489 · Foreign Corporation #4,489 · 79 grants

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

GRANTS-SMALL 79 grants
TOP-DECILE #4,489/49,997
PHOTO-FINISH Nantero
CPC-FOCUS H01L · 25 areas
INNOV-PAR 44.4/100
CLAIMS-PAR 11.0 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +123% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Nantero, 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 SK’s 44.4 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 15.1 pts (34%) Velocity 5.0 pts (11%) Breadth 17.7 pts (40%) Claim depth 6.6 pts (15%)

Qualcomm Incorporated · highest

85
ClearCam · near

44
Glycosyn · near

44
Lighting Science Group · near

44
SK Siltron · this assignee

44
Vactronix Scientific · near

44
3D Lighting… · lowest

7

What this shows SK's Innovation Score is 44.4/100 (top 26% 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 SK?

Each dot is one of SK’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). SK’s own 11.0 claims/patent is at or below the 15.3 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where SK's grants concentrate

SK Siltron Co., Ltd. is a focused PatentsView assignee: 25 CPC subclasses with 44.3% of grants classified under H01L (Semiconductor Devices NOT Covered BY Class H10). Peak complete grant year is 2019 (14 grants) versus a trough of 7 in 2023. By volume, SK sits between Nantero, Inc. and TE Connectivity Nederland BV.

SK's three-year grant acceleration

From 2019–2021 to 2022–2024, SK Siltron Co., Ltd. moved from 36 to 27 grants (0.75x the prior three-year total, a multiple, not a CAGR). See the growth leaderboard.

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.

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for SK, neither rank-band nor same-CPC leaders (those blocks stay above). In H01L (Semiconductor Devices NOT Covered BY Class H10), SK ranks #399 of 3,373 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (44 here).

Lighting Science Group Corporation 44 ClearCam, Inc. 44 Glycosyn LLC 44 Vactronix Scientific, LLC 44

Similar claim depth

Nearest assignees by average claims per patent (11.0 here).

DDP Specialty Electronic Materials US, LLC. 11.0 avg Wieland-werke AG 11.0 avg Amosense Co., Ltd. 11.0 avg Panasonic Liquid Crystal Display Co., Ltd. 11.0 avg

SK's Innovation Score vs. every tracked assignee

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

44 Top 26% higher than 74% 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

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%
2025partial year	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

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

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

SK Siltron Co., Ltd.'s lead technology class is H01L (Semiconductor Devices NOT Covered BY Class H10), 44.3% of its portfolio - see every assignee active in that class. Explore H01L
Ranked #4,489 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare SK Siltron Co., Ltd. against Nantero, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 44.4/100 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.