USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Napra Co., Ltd.

USPTO PatentsView assignee record - 26 granted patents across 17 technology areas, active 2015–2024. 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

5.1

Avg claims per patent

-70%

5-year filing velocity

The verdict

Napra holds 26 US patents across 17 technology areas, rank #11,750 of 50,000 tracked assignees.

#11,750
of 50,000 US assignees by volume: Top 53%
by Innovation Score (34.3/100): 5.1
avg claims per patent: -70%
filing velocity, last 5 yrs

Portfolio overview

Napra Co., Ltd. has been granted 26 US utility patents between 2015 and 2024, placing Napra Co., Ltd. at rank #11,750 across all assignees tracked by PlainPatent. This portfolio spans 17 distinct Cooperative Patent Classification (CPC) subclasses, averaging 5.1 claims per patent with primary concentration in H01L (SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10). As a Foreign Corporation, Napra Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, Napra sits between NS Solutions Corporation (26 patents, rank #11,746) and Northern Digital Inc. (26 patents, rank #11,754) - the closest US assignees by grant volume. The composite Innovation Score of 34.3/100 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 6 grants, compared with 20 in the 2015–2019 window, a -70% 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. Napra Co., Ltd.'s 5.1 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while concentration in 17 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Napra Co., Ltd. against peers pursuing similar technology classes.

NS Solutions

26
Michel VAN DE Wie…

26
Nypro

26
Nanocomp

26
Nation Wide Produ…

26
New Pig

26
Norgren Automatio…

26
Northern Digital

26
Napra ◀

26

What this shows Napra holds 26 patents at rank #11,750, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Napra

By rank, the assignees closest to #11,750 in granted patent volume.

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

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

Napra's Innovation Score vs. every tracked assignee

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

34 Top 53% higher than 47% 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 · 2015–2024

Grants by year

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

View data table

Napra Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	7.7%
2016	6	23.1%
2017	5	19.2%
2018	4	15.4%
2019	3	11.5%
2020	1	3.8%
2021	1	3.8%
2022	3	11.5%
2024	1	3.8%

Which technologies does Napra Co., Ltd. patent most?

H01L - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 20

B23K - SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM 10

B22F - WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER ; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER 8

C22C - ALLOYS 8

H01B - CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES 7

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 3

H05K - PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS 3

B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 2

H10D - INORGANIC ELECTRIC SEMICONDUCTOR DEVICES 2

C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F 1

C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS 1

H01R - ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS 1

H10H - INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS 1

B29C - SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 1

B81C - PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS 1

Top 15 of 17 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Focused

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#11,750

Across all tracked assignees

Innovation Score

34.3 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 Napra Co., Ltd. hold?

Napra Co., Ltd. holds 26 US granted patents filed between 2015 and 2024, spanning 17 technology areas.

What is Napra Co., Ltd.'s Innovation Score?

Napra Co., Ltd. has an Innovation Score of 34.3 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Napra Co., Ltd. focus on?

Napra Co., Ltd.'s top technology area is H01L (SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10) with 20 patents. The company has filed patents in 17 CPC subclasses total.

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

Napra Co., Ltd.'s recent filing velocity is -70% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

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

Napra Co., Ltd.'s patents average 5.1 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Napra 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

Napra's 26 grants land it in the top 53% 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 - Napra ranks #11,750 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.