USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Hitachi Zosen Corporation

USPTO PatentsView assignee record - 128 granted patents across 96 technology areas, active 2015–2024. 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

128

Total patents granted

CPC technology areas

7.6

Avg claims per patent

-29%

5-year filing velocity

The verdict

Hitachi holds 128 US patents across 96 technology areas, rank #2,965 of 50,000 tracked assignees.

#2,965
of 50,000 US assignees by volume: Top 14%
by Innovation Score (49.8/100): 7.6
avg claims per patent: -29%
filing velocity, last 5 yrs

Portfolio overview

Hitachi Zosen Corporation has been granted 128 US utility patents between 2015 and 2024, placing Hitachi Zosen Corporation at rank #2,965 across all assignees tracked by PlainPatent. This portfolio spans 96 distinct Cooperative Patent Classification (CPC) subclasses, averaging 7.6 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, Hitachi Zosen Corporation is one of the broader-portfolio assignees in the PatentsView dataset. By volume, Hitachi sits between Ericsson AB (128 patents, rank #2,961) and K&N Engineering, Inc. (128 patents, rank #2,969) - the closest US assignees by grant volume. The composite Innovation Score of 49.8/100 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 53 grants, compared with 75 in the 2015–2019 window, a -29% 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. Hitachi Zosen Corporation's 7.6 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 96 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Hitachi Zosen Corporation against peers pursuing similar technology classes.

Ericsson AB

128
Electrocore

128
Evolution Enginee…

128
GAS Technology In…

128
HOME BOX Office

128
Ideal Industries

128
Ichikoh Industries

128
K&N Engineering

128
Hitachi Zosen ◀

128

What this shows Hitachi holds 128 patents at rank #2,965, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Hitachi

By rank, the assignees closest to #2,965 in granted patent volume.

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

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

Hitachi's Innovation Score vs. every tracked assignee

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

50 Top 14% higher than 86% 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

Hitachi Zosen Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	15	11.7%
2016	19	14.8%
2017	14	10.9%
2018	16	12.5%
2019	11	8.6%
2020	14	10.9%
2021	17	13.3%
2022	8	6.3%
2023	6	4.7%
2024	8	6.3%

Which technologies does Hitachi Zosen Corporation patent most?

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 39

B01D - SEPARATION 29

C01B - NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C 29

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 24

B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS 24

H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 20

E02B - HYDRAULIC ENGINEERING 14

F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES 11

A61L - METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES 10

B65B - MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING 9

Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION 9

G21K - TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES 9

C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS 8

B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES 8

Y02C - CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG] 7

Top 15 of 96 technology areas

Patent Moat Analysis

Portfolio Volume Moderate

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#2,965

Across all tracked assignees

Innovation Score

49.8 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 Hitachi Zosen Corporation hold?

Hitachi Zosen Corporation holds 128 US granted patents filed between 2015 and 2024, spanning 96 technology areas.

What is Hitachi Zosen Corporation's Innovation Score?

Hitachi Zosen Corporation has an Innovation Score of 49.8 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Hitachi Zosen Corporation focus on?

Hitachi Zosen Corporation's top technology area is Y02E (REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION) with 39 patents. The company has filed patents in 96 CPC subclasses total.

Is Hitachi Zosen Corporation's patent filing rate increasing or decreasing?

Hitachi Zosen Corporation's recent filing velocity is -29% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for Hitachi Zosen Corporation's patents?

Hitachi Zosen Corporation's patents average 7.6 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Hitachi Zosen 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

Hitachi's 128 grants land it in the top 14% 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 - Hitachi ranks #2,965 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.