USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Proterial, Ltd.

USPTO PatentsView assignee record - 185 granted patents across 94 technology areas, active 2023–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: C22C (ALLOYS).

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

Explore the portfolio See the ranking

185

Total patents granted

CPC technology areas

9.7

Avg claims per patent

5-year filing velocity

The verdict

Proterial holds 185 US patents across 94 technology areas, rank #2,133 of 50,000 tracked assignees.

#2,133
of 50,000 US assignees by volume: Top 1%
by Innovation Score (68.9/100): 9.7
avg claims per patent

Portfolio overview

Proterial, Ltd. has been granted 185 US utility patents between 2023 and 2025, placing Proterial, Ltd. at rank #2,133 across all assignees tracked by PlainPatent. This portfolio spans 94 distinct Cooperative Patent Classification (CPC) subclasses, averaging 9.7 claims per patent with primary concentration in C22C (ALLOYS). As a Foreign Corporation, Proterial, Ltd. is one of the broader-portfolio assignees in the PatentsView dataset. By volume, Proterial sits between Fujitsu Semiconductor Limited (185 patents, rank #2,129) and Asics Corporation (184 patents, rank #2,137) - the closest US assignees by grant volume. The composite Innovation Score of 68.9/100 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. Historical data spans 2023 through 2025, with 185 total grants over that period. Velocity comparisons require five years of historical filings to calibrate. 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. Proterial, Ltd.'s 9.7 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 94 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Proterial, Ltd. against peers pursuing similar technology classes.

Fujitsu Semicondu…

185
National Taiwan U…

185
Ossur Iceland EHF

185
PETRÓLEO Brasilei…

185
Perkinelmer Healt…

185
Raytheon BBN

185
Zedel

185
Proterial ◀

185
Asics

184

What this shows Proterial holds 185 patents at rank #2,133, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Proterial

By rank, the assignees closest to #2,133 in granted patent volume.

Leaders in C22C (Alloys)

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

Proterial's Innovation Score vs. every tracked assignee

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

69 Top 1% higher than 99% 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 · 2023–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2023–2019 baseline. Full figures in the table below.

View data table

Proterial, Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2023	65	35.1%
2024	74	40.0%
2025	46	24.9%

Which technologies does Proterial, Ltd. patent most?

C22C - ALLOYS 52

H01B - CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES 49

H01F - MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 27

C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING 25

B22F - WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER ; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER 22

B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 17

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 17

G01L - MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE 14

H02K - DYNAMO-ELECTRIC MACHINES 13

B33Y - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING 13

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 13

C22F - CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS 12

B22D - CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 11

H01R - ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS 10

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

Top 15 of 94 technology areas

Patent Moat Analysis

Portfolio Volume Moderate

Tech Breadth Multi-domain

Claim Depth Simple

Where it ranks

Overall rank by patents

#2,133

Across all tracked assignees

Innovation Score

68.9 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 Proterial, Ltd. hold?

Proterial, Ltd. holds 185 US granted patents filed between 2023 and 2025, spanning 94 technology areas.

What is Proterial, Ltd.'s Innovation Score?

Proterial, Ltd. has an Innovation Score of 68.9 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Proterial, Ltd. focus on?

Proterial, Ltd.'s top technology area is C22C (ALLOYS) with 52 patents. The company has filed patents in 94 CPC subclasses total.

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

Insufficient historical data is available to calculate a velocity trend for Proterial, Ltd..

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

Proterial, Ltd.'s patents average 9.7 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Proterial, 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

Proterial's 185 grants land it in the top 1% 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 - Proterial ranks #2,133 of 50,000. Top 50 holders
Most of this portfolio concentrates in C22C - see who else leads that technology area. C22C 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.