USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Keihin Thermal Technology Corporation

USPTO PatentsView assignee record - 40 granted patents across 20 technology areas, recorded in grant years 2015–2020. 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: F28D (HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT).

Compiled by PlainPatent, US Patent Intelligence Editorial Process · May 15, 2026

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

7.6

Avg claims per patent

-97%

5-year grant velocity

The verdict

According to USPTO PatentsView, Keihin ranks #8,061 of 50,000 tracked US assignees by granted-patent volume, with 40 patents across 20 technology areas.

#8,061
of 50,000 US assignees by volume: Top 56%
by Innovation Score (33.2/100): 7.6
avg claims per patent: -97%
grant velocity, last 5 yrs

Portfolio overview

Keihin Thermal Technology Corporation has been granted 40 US utility patents between 2015 and 2020, placing Keihin Thermal Technology Corporation at #8,061 of 50,000 across all assignees tracked by PlainPatent. This portfolio spans 20 distinct Cooperative Patent Classification (CPC) subclasses, averaging 7.6 claims per patent with primary concentration in F28D (HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT). As a Foreign Corporation, Keihin Thermal Technology Corporation is one of the more focused assignees in the PatentsView dataset. By volume, Keihin sits between JCR Pharmaceuticals Co., Ltd. (40 patents, rank #8,056) and Kojima Industries Corporation (40 patents, rank #8,064) - the closest US assignees by grant volume. The composite Innovation Score of 33.2/100 blends portfolio volume, grant velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Grant cadence records the difference between two grant-year windows. Between 2020 and 2024 the company received 1 grants, compared with 39 in the 2015–2019 window, a -97% shift in five-year grant velocity. Both windows cover five complete grant years; the latest PatentsView year is a partial release and is excluded from this comparison, though it still appears in the yearly table and chart below. Grant timing can lag the related application by years, so this comparison does not establish current R&D spending, strategic intent, or a company’s application activity. The Foreign Corporation classification provides context for the assignee record, not a conclusion about its business strategy.

Claim depth and technology breadth describe this aggregate record. Keihin Thermal Technology Corporation's 7.6 average claims per patent is an average count, not a measure of claim scope, legal strength, enforceability, or design-around risk. The record spans 20 CPC subclasses. Combined with portfolio volume, these figures let readers compare the documented grant records of assignees in similar technology classes.

JCR Pharmaceutica…

40
Jetzero

40
Johannes Gutenber…

40
John Zink

40
Kirin Holdings

40
KUHN

40
Kumiai Chemical I…

40
Kojima Industries

40
Keihin Thermal Te… ◀

40

What this shows Keihin holds 40 patents at rank #8,060, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Keihin

By rank, the assignees closest to #8,060 in granted patent volume.

Leaders in F28D (Heat-exchange Apparatus)

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

Keihin's Innovation Score vs. every tracked assignee

Composite of portfolio volume, grant 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 · 2015–2020

Grants by year

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

View data table

Keihin Thermal Technology Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	5	12.5%
2016	9	22.5%
2017	12	30.0%
2018	8	20.0%
2019	5	12.5%
2020	1	2.5%

Which technologies does Keihin Thermal Technology Corporation patent most?

F28D - HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT 32

F28F - DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION 29

F25B - REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS 26

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 9

B60H - ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES 7

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 6

B23P - METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 5

B23K - SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM 4

C22C - ALLOYS 2

B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 2

B21D - WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL 2

C21C - PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS 1

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

F25D - REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR 1

F28B - STEAM OR VAPOUR CONDENSERS 1

Top 15 of 20 technology areas

Grant record at a glance

Portfolio Volume 40 grants

CPC subclasses 20

Avg. claims / grant 7.6

Velocity -97%

Historical grant data only; it does not rate legal strength or current strategy.

Where it ranks

Overall rank by patents

#8,061

of 50,000 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

Where does Keihin Thermal Technology Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Keihin Thermal Technology Corporation ranks #8,061 of 50,000 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Keihin Thermal Technology Corporation hold?

Keihin Thermal Technology Corporation holds 40 US utility patents granted between 2015 and 2020, spanning 20 technology areas.

What is Keihin Thermal Technology Corporation's Innovation Score?

Keihin Thermal Technology Corporation has an Innovation Score of 33.2 out of 100 (top 56% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Keihin Thermal Technology Corporation focus on?

Keihin Thermal Technology Corporation's top technology area is F28D (HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT) with 32 patents. Grants appear in 20 CPC subclasses total.

Is Keihin Thermal Technology Corporation's patent grant rate increasing or decreasing?

Keihin Thermal Technology Corporation's recent grant velocity is -97% 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 Keihin Thermal Technology Corporation's patents?

Keihin Thermal Technology 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 Keihin Thermal Technology 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

Keihin's 40 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 - Keihin ranks #8,061 of 50,000. Top 50 holders
Most of this portfolio concentrates in F28D - see who else leads that technology area. F28D 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

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.