USPTO 2015–2025 USPTO PatentsView Foreign Corporation

National Chi Nan University

USPTO PatentsView assignee record - 64 granted patents across 47 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H03F (AMPLIFIERS).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

10.1

Avg claims per patent

-58%

5-year filing velocity

The verdict

National holds 64 US patents across 47 technology areas, rank #5,386 of 50,000 tracked assignees.

#5,386
of 50,000 US assignees by volume: Top 22%
by Innovation Score (46.0/100): 10.1
avg claims per patent: -58%
filing velocity, last 5 yrs

Portfolio overview

National Chi Nan University has been granted 64 US utility patents between 2015 and 2025, placing National Chi Nan University at rank #5,386 across all assignees tracked by PlainPatent. This portfolio spans 47 distinct Cooperative Patent Classification (CPC) subclasses, averaging 10.1 claims per patent with primary concentration in H03F (AMPLIFIERS). As a Foreign Corporation, National Chi Nan University is one of the more focused assignees in the PatentsView dataset. By volume, National sits between Meritor Heavy Vehicle Braking Systems (uk) Limited (64 patents, rank #5,382) and OJJO, Inc. (64 patents, rank #5,390) - the closest US assignees by grant volume. The composite Innovation Score of 46.0/100 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 19 grants, compared with 45 in the 2015–2019 window, a -58% 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. National Chi Nan University's 10.1 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 47 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark National Chi Nan University against peers pursuing similar technology classes.

Meritor Heavy Veh…

64
Mid-west Metal Pr…

64
Nisshinbo Holdings

64
Narrative Science

64
National Products

64
National Universi…

64
Nokian Tyres

64
OJJO

64
National Chi Nan… ◀

64

What this shows National holds 64 patents at rank #5,386, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near National

By rank, the assignees closest to #5,386 in granted patent volume.

Leaders in H03F (Amplifiers)

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

National's Innovation Score vs. every tracked assignee

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

46 Top 22% higher than 78% 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 · 2015–2025

Grants by year

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

View data table

National Chi Nan University patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	9	14.1%
2016	5	7.8%
2017	6	9.4%
2018	6	9.4%
2019	19	29.7%
2020	8	12.5%
2021	3	4.7%
2022	3	4.7%
2023	3	4.7%
2025	2	3.1%

Which technologies does National Chi Nan University patent most?

H03F - AMPLIFIERS 14

H03D - DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER 11

H01P - WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE 10

H03B - GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS 10

H04B - TRANSMISSION 6

H03H - IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS 5

H03K - PULSE TECHNIQUE 4

C07D - HETEROCYCLIC COMPOUNDS 4

H02M - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF 4

H04N - PICTORIAL COMMUNICATION, e.g. TELEVISION 3

G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY 3

H02J - CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 3

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 3

C09B - ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES ; , e.g. PIGMENTS; MORDANTS; LAKES 3

H03L - AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES 3

Top 15 of 47 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#5,386

Across all tracked assignees

Innovation Score

46.0 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 National Chi Nan University hold?

National Chi Nan University holds 64 US granted patents filed between 2015 and 2025, spanning 47 technology areas.

What is National Chi Nan University's Innovation Score?

National Chi Nan University has an Innovation Score of 46.0 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does National Chi Nan University focus on?

National Chi Nan University's top technology area is H03F (AMPLIFIERS) with 14 patents. The company has filed patents in 47 CPC subclasses total.

Is National Chi Nan University's patent filing rate increasing or decreasing?

National Chi Nan University's recent filing velocity is -58% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for National Chi Nan University's patents?

National Chi Nan University's patents average 10.1 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the National Chi Nan University 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

National's 64 grants land it in the top 22% 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 - National ranks #5,386 of 50,000. Top 50 holders
Most of this portfolio concentrates in H03F - see who else leads that technology area. H03F 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.