Where does Hitachi Zosen Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Hitachi Zosen Corporation ranks #2,965 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Hitachi Zosen Corporation hold?

Hitachi Zosen Corporation holds 128 US utility patents granted 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 (top 14% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

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

Hitachi Zosen Corporation's recent grant velocity is -29% compared to the prior five-year period (grant years, not application filing dates). Grant 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 an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Hitachi Zosen Corporation

Q: 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. Grants appear in 96 CPC subclasses total.

USPTO PatentsView assignee record - 128 granted patents across 96 technology areas, recorded in grant years 2015–2024. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Hitachi ranks #2,965 of 49,997 tracked US assignees by granted-patent volume, with 128 patents across 96 technology areas.

#2,965
of 49,997 US assignees by volume: Top 14%
by Innovation Score (49.8/100): 7.6
avg claims per patent: -29%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R2965 · Foreign Corporation #2,965 · 128 grants

GRANTS-MID · TOP-DECILE · PHOTO-FINISH · CPC-WIDE · INNOV-PAR · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-MID 128 grants
TOP-DECILE #2,965/49,997
PHOTO-FINISH Electrocore
CPC-WIDE Y02E · 96 areas
INNOV-PAR 49.8/100
CLAIMS-SPARSE 7.6 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -29% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Electrocore, Inc. (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

Qualcomm Incorporated · highest

85
EMS-Patent · near

50
Beneq OY · near

50
Hitachi Zosen · this assignee

50
Korea Meteorological… · near

50
Shaanxi Lighte… · near

50
3D Lighting… · lowest

7

What this shows Hitachi's Innovation Score is 49.8/100 (top 14% of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

How Hitachi's grant cadence moved

Between 2020–2024, Hitachi Zosen Corporation received 53 grants versus 75 in 2015–2019 (-29% equal-window velocity, below median growth). Across complete PatentsView years, output peaked in 2016 at 19 grants and bottomed in 2023 at 6. Lead class Y02E accounts for 30.5% of the portfolio across 96 subclasses. Volume neighbours: Ericsson AB (#2,961) and K&N Engineering, Inc. (#2,969).

Hitachi's three-year grant acceleration

From 2019–2021 to 2022–2024, Hitachi Zosen Corporation moved from 42 to 22 grants (0.52x the prior three-year total, a multiple, not a CAGR). Among 3,296 tracked assignees with ≥100 grants and ≥20 prior-period grants, that multiple ranks #2,631. See the growth leaderboard.

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.

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Hitachi, neither rank-band nor same-CPC leaders (those blocks stay above).

Similar innovation score

Nearest assignees by Innovation Score (50 here).

Shaanxi Lighte Optoelectronics Material Co., Ltd. 50 Beneq OY 50 Korea Meteorological Administration 50 EMS-Patent AG 50

Similar claim depth

Nearest assignees by average claims per patent (7.6 here).

Yanshan University 7.6 avg Acorn Engineering Company 7.6 avg Fuji Electric FA Components & Systems Co., Ltd. 7.6 avg Pacific Industrial Co., Ltd. 7.6 avg

Hitachi's Innovation Score vs. every tracked assignee

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

50 Top 14% higher than 86% of 49,997 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

Where it ranks

Overall rank by patents

#2,965

of 49,997 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?

What to do with this data

Hitachi Zosen Corporation's patent record in context - here's where to go next.

Hitachi Zosen Corporation's lead technology class is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution), 30.5% of its portfolio - see every assignee active in that class. Explore Y02E
Ranked #2,965 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Hitachi Zosen Corporation against Ericsson AB, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 49.8/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent

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 by PlainPatent, US Patent Intelligence Editorial Process · 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.