Where does Epistar Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Epistar Corporation ranks #504 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 Epistar Corporation hold?

Epistar Corporation holds 889 US utility patents granted between 2015 and 2025, spanning 48 technology areas.

What is Epistar Corporation's Innovation Score?

Epistar Corporation has an Innovation Score of 61.4 out of 100 (top 3% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Epistar Corporation focus on?

Epistar Corporation's top technology area is H10H (Inorganic Light-emitting Semiconductor Devices Having Potential Barriers) with 688 patents, ranking #4 of 857 assignees active in that subclass. Grants appear in 48 CPC subclasses total.

Is Epistar Corporation's patent grant rate increasing or decreasing?

Epistar Corporation's recent grant velocity is -40% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

What does claim depth mean for Epistar Corporation's patents?

Epistar Corporation's patents average 15.4 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 Epistar Corporation 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

Epistar Corporation

USPTO PatentsView assignee record - 889 granted patents across 48 technology areas, recorded in grant years 2015–2025. 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: H10H (Inorganic Light-emitting Semiconductor Devices Having Potential Barriers).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Epistar ranks #504 of 49,997 tracked US assignees by granted-patent volume, with 889 patents across 48 technology areas.

#504
of 49,997 US assignees by volume: Top 3%
by Innovation Score (61.4/100): 15.4
avg claims per patent: -40%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R504 · Foreign Corporation #504 · 889 grants

GRANTS-MID · TOP-DECILE · PHOTO-FINISH · CPC-WIDE · INNOV-STRONG · CLAIMS-RICH · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-MID 889 grants
TOP-DECILE #504/49,997
PHOTO-FINISH Illumina
CPC-WIDE H10H · 48 areas
INNOV-STRONG 61.4/100
CLAIMS-RICH 15.4 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -40% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Illumina, Inc. (±1 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 Epistar’s 61.4 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 23.5 pts (38%) Velocity 4.2 pts (7%) Breadth 24.5 pts (40%) Claim depth 9.2 pts (15%)

Qualcomm Incorporated · highest

85
Carl Zeiss SMS · near

61
Epistar · this assignee

61
SAF-Holland · near

61
Zhejiang Sanhua… · near

61
Corning Optical… · near

61
3D Lighting… · lowest

7

What this shows Epistar's Innovation Score is 61.4/100 (top 3% 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 Epistar?

Each dot is one of Epistar’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). Epistar’s own 15.4 claims/patent is at or below the 15.6 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Epistar's grants concentrate

Epistar Corporation is a focused PatentsView assignee: 48 CPC subclasses with 77.4% of grants classified under H10H (Inorganic Light-emitting Semiconductor Devices Having Potential Barriers). Peak complete grant year is 2016 (142 grants) versus a trough of 54 in 2022. By volume, Epistar sits between Arkema France and Weatherford Technology Holdings, LLC.

Epistar's three-year grant acceleration

From 2019–2021 to 2022–2024, Epistar Corporation moved from 261 to 163 grants (0.63x the prior three-year total, a multiple, not a CAGR). Among 3,296 tracked assignees with ≥100 grants and ≥20 prior-period grants, that multiple ranks #2,378. See the growth leaderboard.

Arkema France

892
Illumina

890
Nissan North Amer…

890
Shell OIL Compny

890
Epistar ◀

889
Stmicroelectronics

888
Zhejiang Universi…

888
Societe des Produ…

887
Weatherford Techn…

886

What this shows Epistar holds 889 patents at rank #504, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Epistar

By rank, the assignees closest to #504 in granted patent volume.

Leaders in H10H (Inorganic Light-emitting Semiconductor Devices Having Pot…)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Epistar, neither rank-band nor same-CPC leaders (those blocks stay above). In H10H (Inorganic Light-emitting Semiconductor Devices Having Pot…), Epistar ranks #4 of 857 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (61 here).

SAF-Holland, Inc. 61 Zhejiang Sanhua Intelligent Controls Co., Ltd 61 Carl Zeiss SMS Ltd. 61 Corning Optical Communications LLC 61

Similar claim depth

Nearest assignees by average claims per patent (15.4 here).

UOP LLC 15.4 avg Hewlett-packard Development Company, L.P. 15.4 avg Trumpf Werkzeugmaschinen GmbH + Co. KG 15.4 avg Sandoz AG 15.4 avg

Epistar's Innovation Score vs. every tracked assignee

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

61 Top 3% higher than 97% 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 · 2015–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Epistar Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	95	10.7%
2016	142	16.0%
2017	109	12.3%
2018	92	10.3%
2019	101	11.4%
2020	97	10.9%
2021	63	7.1%
2022	54	6.1%
2023	54	6.1%
2024	55	6.2%
2025partial year	27	3.0%

Which technologies does Epistar Corporation patent most?

H10H - Inorganic Light-emitting Semiconductor Devices Having Potential Barriers 688

H01L - Semiconductor Devices NOT Covered BY Class H10 391

F21K - Non-electric Light Sources Using LUMINESCENCE; Light Sources Using ELECTROCHEMILUMINESCENCE; Light Sources Using Charges OF Combustible MATERIAL; Light Sources Using Semiconductor Devices AS Light-generating ELEMENTS; Light Sources NOT Otherwise Provided FOR 96

F21Y - Indexing Scheme Associated With Subclasses F21k, F21l, F21s and F21v, Relating TO THE Form OR THE Kind OF THE Light Sources OR OF THE Colour OF THE Light Emitted 89

F21V - Functional Features OR Details OF Lighting Devices OR Systems THEREOF; Structural Combinations OF Lighting Devices With Other Articles, NOT Otherwise Provided FOR 62

H10D - Inorganic Electric Semiconductor Devices 52

H10F - Inorganic Semiconductor Devices Sensitive TO Infrared Radiation, Light, Electromagnetic Radiation OF Shorter Wavelength OR Corpuscular Radiation 35

H05B - Electric HEATING; Electric Light Sources NOT Otherwise Provided FOR; Circuit Arrangements FOR Electric Light Sources, IN General 25

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 20

Y02B - Climate Change Mitigation Technologies Related TO Buildings, e.g. Housing, House Appliances OR Related End-user Applications 14

H01S - Devices Using THE Process OF Light Amplification BY Stimulated Emission OF Radiation [LASER] TO Amplify OR Generate LIGHT; Devices Using Stimulated Emission OF Electromagnetic Radiation IN Wave Ranges Other Than Optical 13

F21S - Non-portable Lighting DEVICES; Systems THEREOF; Vehicle Lighting Devices Specially Adapted FOR Vehicle Exteriors 12

H05K - Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components 12

G09G - Arrangements OR Circuits FOR Control OF Indicating Devices Using Static Means TO Present Variable Information 12

G02B - Optical Elements, Systems OR Apparatus 9

Top 15 of 48 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

Epistar Corporation's patent record in context - here's where to go next.

Epistar Corporation's lead technology class is H10H (Inorganic Light-emitting Semiconductor Devices Having Potential Barriers), 77.4% of its portfolio - see every assignee active in that class. Explore H10H
Ranked #504 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Epistar Corporation against Arkema France, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 61.4/100 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.