USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Mitsui Mining & Smelting Co., Ltd.

USPTO PatentsView assignee record - 254 granted patents across 75 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: Y02E (REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION).

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

Explore the portfolio See the ranking

254

Total patents granted

CPC technology areas

10.8

Avg claims per patent

+31%

5-year filing velocity

The verdict

Mitsui holds 254 US patents across 75 technology areas, rank #1,623 of 50,000 tracked assignees.

#1,623
of 50,000 US assignees by volume: Top 6%
by Innovation Score (56.5/100): 10.8
avg claims per patent: +31%
filing velocity, last 5 yrs

Portfolio overview

Mitsui Mining & Smelting Co., Ltd. has been granted 254 US utility patents between 2015 and 2025, placing Mitsui Mining & Smelting Co., Ltd. at rank #1,623 across all assignees tracked by PlainPatent. This portfolio spans 75 distinct Cooperative Patent Classification (CPC) subclasses, averaging 10.8 claims per patent with primary concentration in Y02E (REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION). As a Foreign Corporation, Mitsui Mining & Smelting Co., Ltd. is one of the broader-portfolio assignees in the PatentsView dataset. By volume, Mitsui sits between Memjet Technology Limited (255 patents, rank #1,619) and Heidelberger Druckmaschinen Ag (253 patents, rank #1,627) - the closest US assignees by grant volume. The composite Innovation Score of 56.5/100 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 144 grants, compared with 110 in the 2015–2019 window, a +31% shift in five-year velocity. Steady filing volume suggests sustained innovation without dramatic pivots. 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. Mitsui Mining & Smelting Co., Ltd.'s 10.8 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 75 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Mitsui Mining & Smelting Co., Ltd. against peers pursuing similar technology classes.

Memjet Technology

255
Merit Medical Sys…

255
Nanjing University

255
Z124

255
Shin-etsu Handotai

254
Mitsui Mining & S… ◀

254
Aruba Networks

253
E Mishan & SONS

253
Heidelberger Druc…

253

What this shows Mitsui holds 254 patents at rank #1,623, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Mitsui

By rank, the assignees closest to #1,623 in granted patent volume.

Leaders in Y02E (Reduction OF Greenhouse GAS [GHG] Emissions)

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

Mitsui's Innovation Score vs. every tracked assignee

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

57 Top 6% higher than 94% 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

Mitsui Mining & Smelting Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	13	5.1%
2016	25	9.8%
2017	22	8.7%
2018	14	5.5%
2019	36	14.2%
2020	23	9.1%
2021	20	7.9%
2022	20	7.9%
2023	20	7.9%
2024	30	11.8%
2025	31	12.2%

Which technologies does Mitsui Mining & Smelting Co., Ltd. patent most?

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 81

H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 75

B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS 66

H05K - PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS 57

B01D - SEPARATION 56

Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION 52

C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS 52

H01B - CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES 46

F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES 41

C01B - NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C 41

B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 40

C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F 32

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 27

H01L - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 27

C23C - COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL 24

Top 15 of 75 technology areas

Patent Moat Analysis

Portfolio Volume Moderate

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Growing

Where it ranks

Overall rank by patents

#1,623

Across all tracked assignees

Innovation Score

56.5 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 Mitsui Mining & Smelting Co., Ltd. hold?

Mitsui Mining & Smelting Co., Ltd. holds 254 US granted patents filed between 2015 and 2025, spanning 75 technology areas.

What is Mitsui Mining & Smelting Co., Ltd.'s Innovation Score?

Mitsui Mining & Smelting Co., Ltd. has an Innovation Score of 56.5 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Mitsui Mining & Smelting Co., Ltd. focus on?

Mitsui Mining & Smelting Co., Ltd.'s top technology area is Y02E (REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION) with 81 patents. The company has filed patents in 75 CPC subclasses total.

Is Mitsui Mining & Smelting Co., Ltd.'s patent filing rate increasing or decreasing?

Mitsui Mining & Smelting Co., Ltd.'s recent filing velocity is +31% compared to the prior five-year period. The company is maintaining or growing its patent output.

What does claim depth mean for Mitsui Mining & Smelting Co., Ltd.'s patents?

Mitsui Mining & Smelting Co., Ltd.'s patents average 10.8 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Mitsui Mining & Smelting 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

Mitsui's 254 grants land it in the top 6% 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 - Mitsui ranks #1,623 of 50,000. Top 50 holders
Most of this portfolio concentrates in Y02E - see who else leads that technology area. Y02E 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.