Overall rank by patents
#26,858
Across all tracked assignees
USPTO 2015–2025 USPTO PatentsView Foreign Corporation
Marubun Corporation
USPTO PatentsView assignee record - 10 granted patents across 3 technology areas, active 2016–2022. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H10H (INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS).
10
Total patents granted
3
CPC technology areas
8.6
Avg claims per patent
-57%
5-year filing velocity
The verdict
Marubun holds 10 US patents across 3 technology areas, rank #26,858 of 50,000 tracked assignees.
- #26,858
- of 50,000 US assignees by volume
- Top 89%
- by Innovation Score (22.9/100)
- 8.6
- avg claims per patent
- -57%
- filing velocity, last 5 yrs
Portfolio overview
Marubun Corporation has been granted 10 US utility patents between 2016 and 2022, placing Marubun Corporation at rank #26,858 across all assignees tracked by PlainPatent. This portfolio spans 3 distinct Cooperative Patent Classification (CPC) subclasses, averaging 8.6 claims per patent with primary concentration in H10H (INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS). As a Foreign Corporation, Marubun Corporation is one of the more focused assignees in the PatentsView dataset. By volume, Marubun sits between Maine Medical Center (10 patents, rank #26,854) and Matrix Industries, Inc. (10 patents, rank #26,862) - the closest US assignees by grant volume. The composite Innovation Score of 22.9/100 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 3 grants, compared with 7 in the 2015–2019 window, a -57% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. 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. Marubun Corporation's 8.6 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while specialization in 3 subclasses reflects a tightly scoped invention area. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Marubun Corporation against peers pursuing similar technology classes.
Who files at Marubun's volume?
Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀
- Maine Medical Cen…
Maine Medical Center
10 patents
- Mansur Gavriel
Mansur Gavriel, LLC
10 patents
- Marc Jacobs Trade…
Marc Jacobs Trademarks, LLC
10 patents
- Marine Power Prod…
Marine Power Products Incorporated
10 patents
- Marvin Engineering
Marvin Engineering Co., Inc.
10 patents
- Maschio Gaspardo…
Maschio Gaspardo S.p.A.
10 patents
- Mativ Holdings
Mativ Holdings, Inc.
10 patents
- Matrix Industries
Matrix Industries, Inc.
10 patents
- Marubun ◀
Marubun Corporation
10 patents
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.
- Maine Medical Center #26,854 · 10 patents
- Mansur Gavriel, Llc #26,855 · 10 patents
- Marc Jacobs Trademarks, Llc #26,856 · 10 patents
- Marine Power Products Incorporated #26,857 · 10 patents
- Marvin Engineering Co., Inc. #26,859 · 10 patents
- Maschio Gaspardo S.p.a. #26,860 · 10 patents
- Mativ Holdings, Inc. #26,861 · 10 patents
- Matrix Industries, Inc. #26,862 · 10 patents
Leaders in H10H (Inorganic Light-emitting Semiconductor Devices Having Pot…)
Other assignees with the most granted patents in Marubun's primary technology class.
- Nichia Corporation 1,693 in class
- Osram Opto Semiconductors Gmbh 888 in class
- LG Innotek Co., Ltd. 816 in class
- Epistar Corporation 688 in class
- Lumileds Llc 526 in class
- Seoul Viosys Co., Ltd. 524 in class
- Semiconductor Energy Laboratory Co., Ltd. 459 in class
- BOE Technology Group Co., Ltd. 439 in class
Marubun's Innovation Score vs. every tracked assignee
Composite of portfolio volume, filing velocity, technology breadth, and claim depth (0–100)
23 Top 89% higher than 11% 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
Grants by year
Teal-shaded recent years (2020–present) versus the 2016–2019 baseline. Full figures in the table below.
View data table
| 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?
Top 3 of 3 technology areas
Patent Moat Analysis
Portfolio Volume Light
Tech Breadth Specialized
Claim Depth Simple
Velocity Declining
Frequently Asked Questions
How many patents does Marubun Corporation hold?
Marubun Corporation holds 10 US granted patents filed 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. This composite metric weighs portfolio volume (40%), filing 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. The company has filed patents in 3 CPC subclasses total.
Is Marubun Corporation's patent filing rate increasing or decreasing?
Marubun Corporation's recent filing velocity is -57% compared to the prior five-year period. Filing 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 relatively simple claim structure, typical for focused inventions.
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.
How to use this portfolio
Marubun's 10 grants land it in the top 89% 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 - Marubun ranks #26,858 of 50,000. Top 50 holders
- Most of this portfolio concentrates in H10H - see who else leads that technology area. H10H 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.
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.