Where does Marubun Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Marubun Corporation ranks #26,801 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 Marubun Corporation hold?

Marubun Corporation holds 10 US utility patents granted between 2016 and 2022, spanning 3 technology areas.

What is Marubun Corporation's Innovation Score?

Marubun Corporation has an Innovation Score of 22.9 out of 100 (11th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Marubun Corporation focus on?

Marubun Corporation's top technology area is H10H (Inorganic Light-emitting Semiconductor Devices Having Potential Barriers) with 8 patents, ranking #240 of 857 assignees active in that subclass. Grants appear in 3 CPC subclasses total.

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

Marubun Corporation's recent grant velocity is -57% 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 Marubun Corporation's patents?

Marubun Corporation's patents average 8.6 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 Marubun 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

Marubun Corporation

USPTO PatentsView assignee record - 10 granted patents across 3 technology areas, recorded in grant years 2016–2022. 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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The verdict

According to USPTO PatentsView, Marubun ranks #26,801 of 49,997 tracked US assignees by granted-patent volume, with 10 patents across 3 technology areas.

#26,801
of 49,997 US assignees by volume: 11th percentile
by Innovation Score (22.9/100): 8.6
avg claims per patent: -57%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R26801 · Foreign Corporation #26,801 · 10 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-PAR · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 10 grants
MID-PACK #26,801/49,997
PHOTO-FINISH Maine Medical Center
CPC-NARROW H10H · 3 areas
INNOV-THIN 22.9/100
CLAIMS-PAR 8.6 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -57% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Maine Medical Center (±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 Marubun’s 22.9 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 8.3 pts (36%) Velocity 3.3 pts (14%) Breadth 6.1 pts (27%) Claim depth 5.2 pts (23%)

Qualcomm Incorporated · highest

85
Marubun · this assignee

23
3D Lighting… · lowest

7

What this shows Marubun's Innovation Score is 22.9/100 (11th 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 Marubun?

Each dot is one of Marubun’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). Marubun’s own 8.6 claims/patent is at or below the 12.9 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Marubun's grants concentrate

Marubun Corporation is a focused PatentsView assignee: 3 CPC subclasses with 80% of grants classified under H10H (Inorganic Light-emitting Semiconductor Devices Having Potential Barriers). Peak complete grant year is 2017 (3 grants) versus a trough of 1 in 2016. By volume, Marubun sits between Maine Medical Center and Matrix Industries, Inc..

Marubun's three-year grant acceleration

Marubun Corporation shows 1 grants in 2022–2024 against only 2 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.

Maine Medical Cen…

10
Mansur Gavriel

10
Marc Jacobs Trade…

10
Marine Power Prod…

10
Marvin Engineering

10
Maschio Gaspardo…

10
Mativ Holdings

10
Matrix Industries

10
Marubun ◀

10

What this shows Marubun holds 10 patents at rank #26,858, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Marubun

By rank, the assignees closest to #26,858 in granted patent volume.

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

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

Marubun's Innovation Score vs. every tracked assignee

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

23 11th percentile higher than 11% 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 · 2016–2022

Grants by year

Teal-shaded recent years (2020–present) versus the 2016–2019 baseline. Full figures in the table below.

View data table

Marubun Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	1	10.0%
2017	3	30.0%
2018	3	30.0%
2020	1	10.0%
2021	1	10.0%
2022	1	10.0%

Which technologies does Marubun Corporation patent most?

H10H - Inorganic Light-emitting Semiconductor Devices Having Potential Barriers 8

G06F - Electric Digital Data Processing 1

H01L - Semiconductor Devices NOT Covered BY Class H10 1

Top 3 of 3 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

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

Marubun Corporation's lead technology class is H10H (Inorganic Light-emitting Semiconductor Devices Having Potential Barriers), 80% of its portfolio - see every assignee active in that class. Explore H10H
Ranked #26,801 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Marubun Corporation against Maine Medical Center, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 22.9/100 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.