USPTO 2015–2025 USPTO PatentsView Foreign Corporation

IHI Machinery AND Furnace Co., Ltd.

USPTO PatentsView assignee record - 22 granted patents across 19 technology areas, active 2015–2023. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: F27D (DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE).

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

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

7.9

Avg claims per patent

-53%

5-year filing velocity

The verdict

IHI holds 22 US patents across 19 technology areas, rank #13,476 of 50,000 tracked assignees.

#13,476
of 50,000 US assignees by volume: Top 56%
by Innovation Score (33.2/100): 7.9
avg claims per patent: -53%
filing velocity, last 5 yrs

Portfolio overview

IHI Machinery AND Furnace Co., Ltd. has been granted 22 US utility patents between 2015 and 2023, placing IHI Machinery AND Furnace Co., Ltd. at rank #13,476 across all assignees tracked by PlainPatent. This portfolio spans 19 distinct Cooperative Patent Classification (CPC) subclasses, averaging 7.9 claims per patent with primary concentration in F27D (DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE). As a Foreign Corporation, IHI Machinery AND Furnace Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, IHI sits between Humane, Inc. (22 patents, rank #13,472) and International Currency Technologies Corporation (22 patents, rank #13,480) - the closest US assignees by grant volume. The composite Innovation Score of 33.2/100 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 7 grants, compared with 15 in the 2015–2019 window, a -53% 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 Machinery AND Furnace Co., Ltd.'s 7.9 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while concentration in 19 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark IHI Machinery AND Furnace Co., Ltd. against peers pursuing similar technology classes.

Humane

22
Hydis

22
Hyperlight

22
IDEA Nuova

22
IMAX Theatres Int…

22
Importla

22
Infinitesima

22
International Cur…

22
IHI Machinery AND… ◀

22

What this shows IHI holds 22 patents at rank #13,476, 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 #13,476 in granted patent volume.

Leaders in F27D (Details OR Accessories OF Furnaces)

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)

33 Top 56% higher than 44% 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 · 2015–2023

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

IHI Machinery AND Furnace Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	9.1%
2016	2	9.1%
2017	4	18.2%
2018	2	9.1%
2019	5	22.7%
2020	4	18.2%
2022	1	4.5%
2023	2	9.1%

Which technologies does IHI Machinery AND Furnace Co., Ltd. patent most?

F27D - DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE 14

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 14

F27B - FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS 13

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 5

B08B - CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL 4

C23G - CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS 4

C01B - NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C 2

C22C - ALLOYS 1

G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY 1

B30B - PRESSES IN GENERAL 1

B22F - WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER ; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER 1

F26B - DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM 1

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 1

F28D - HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT 1

F28F - DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION 1

Top 15 of 19 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Focused

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#13,476

Across all tracked assignees

Innovation Score

33.2 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 Machinery AND Furnace Co., Ltd. hold?

IHI Machinery AND Furnace Co., Ltd. holds 22 US granted patents filed between 2015 and 2023, spanning 19 technology areas.

What is IHI Machinery AND Furnace Co., Ltd.'s Innovation Score?

IHI Machinery AND Furnace Co., Ltd. has an Innovation Score of 33.2 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 Machinery AND Furnace Co., Ltd. focus on?

IHI Machinery AND Furnace Co., Ltd.'s top technology area is F27D (DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE) with 14 patents. The company has filed patents in 19 CPC subclasses total.

Is IHI Machinery AND Furnace Co., Ltd.'s patent filing rate increasing or decreasing?

IHI Machinery AND Furnace Co., Ltd.'s recent filing velocity is -53% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for IHI Machinery AND Furnace Co., Ltd.'s patents?

IHI Machinery AND Furnace Co., Ltd.'s patents average 7.9 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the IHI Machinery AND Furnace 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

IHI's 22 grants land it in the top 56% 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 #13,476 of 50,000. Top 50 holders
Most of this portfolio concentrates in F27D - see who else leads that technology area. F27D 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.