USPTO 2015–2025 USPTO PatentsView Foreign Corporation

IHI Corporation

USPTO PatentsView assignee record - 928 granted patents across 248 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: F05D (INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS).

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

Explore the portfolio See the ranking

928

Total patents granted

248

CPC technology areas

8.2

Avg claims per patent

-13%

5-year filing velocity

The verdict

IHI holds 928 US patents across 248 technology areas, rank #476 of 50,000 tracked assignees.

#476
of 50,000 US assignees by volume: Top 5%
by Innovation Score (57.8/100): 8.2
avg claims per patent: -13%
filing velocity, last 5 yrs

Portfolio overview

IHI Corporation has been granted 928 US utility patents between 2015 and 2025, placing IHI Corporation at rank #476 across all assignees tracked by PlainPatent. This portfolio spans 248 distinct Cooperative Patent Classification (CPC) subclasses, averaging 8.2 claims per patent with primary concentration in F05D (INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS). As a Foreign Corporation, IHI Corporation is one of the broader-portfolio assignees in the PatentsView dataset. By volume, IHI sits between Agency FOR Science, Technology AND Research (939 patents, rank #472) and Eaton Corporation (924 patents, rank #480) - the closest US assignees by grant volume. The composite Innovation Score of 57.8/100 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 431 grants, compared with 497 in the 2015–2019 window, a -13% 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. IHI Corporation's 8.2 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a diversified footprint across 100+ CPC subclasses spreads risk across many technology fronts. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark IHI Corporation against peers pursuing similar technology classes.

Agency FOR Scienc…

939
Fujikura

933
Wacom

933
Lumileds

930
Level 3 Communica…

928
IHI ◀

928
Verily Life Scien…

926
ZEON

926
Eaton

924

What this shows IHI holds 928 patents at rank #476, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near IHI

By rank, the assignees closest to #476 in granted patent volume.

Leaders in F05D (Indexing Scheme FOR Aspects Relating TO Non-positive-disp…)

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

IHI's Innovation Score vs. every tracked assignee

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

58 Top 5% higher than 95% 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

IHI Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	64	6.9%
2016	91	9.8%
2017	109	11.7%
2018	102	11.0%
2019	131	14.1%
2020	104	11.2%
2021	84	9.1%
2022	77	8.3%
2023	51	5.5%
2024	74	8.0%
2025	41	4.4%

Which technologies does IHI Corporation patent most?

F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS 281

Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION 260

F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES 226

F02B - INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL 167

F04D - NON-POSITIVE-DISPLACEMENT PUMPS 143

H02J - CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 125

B60L - PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES ; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES ; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL ; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICL 99

F02C - GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS 98

F16C - SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS 86

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 61

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 45

B01D - SEPARATION 43

H01F - MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 42

B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS 41

G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 36

Top 15 of 248 technology areas

Patent Moat Analysis

Portfolio Volume Moderate

Tech Breadth Diversified

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#476

Across all tracked assignees

Innovation Score

57.8 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 IHI Corporation hold?

IHI Corporation holds 928 US granted patents filed between 2015 and 2025, spanning 248 technology areas.

What is IHI Corporation's Innovation Score?

IHI Corporation has an Innovation Score of 57.8 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does IHI Corporation focus on?

IHI Corporation's top technology area is F05D (INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS) with 281 patents. The company has filed patents in 248 CPC subclasses total.

Is IHI Corporation's patent filing rate increasing or decreasing?

IHI Corporation's recent filing velocity is -13% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for IHI Corporation's patents?

IHI Corporation's patents average 8.2 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the IHI 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

IHI's 928 grants land it in the top 5% 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 - IHI ranks #476 of 50,000. Top 50 holders
Most of this portfolio concentrates in F05D - see who else leads that technology area. F05D 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.