PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

KEY Foundry Co., Ltd.

USPTO PatentsView assignee record - 43 granted patents across 9 technology areas, recorded in grant years 2020–2024. 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: H10D (INORGANIC ELECTRIC SEMICONDUCTOR DEVICES).

Explore the portfolio See the ranking
43
Total patents granted
9
CPC technology areas
17.4
Avg claims per patent
-
5-year grant velocity

The verdict

According to USPTO PatentsView, KEY ranks #7,582 of 50,000 tracked US assignees by granted-patent volume, with 43 patents across 9 technology areas.

#7,582
of 50,000 US assignees by volume
Top 17%
by Innovation Score (48.0/100)
17.4
avg claims per patent

Portfolio overview

KEY Foundry Co., Ltd. has been granted 43 US utility patents between 2020 and 2024, placing KEY Foundry Co., Ltd. at #7,582 of 50,000 across all assignees tracked by PlainPatent. This portfolio spans 9 distinct Cooperative Patent Classification (CPC) subclasses, averaging 17.4 claims per patent with primary concentration in H10D (INORGANIC ELECTRIC SEMICONDUCTOR DEVICES). As a Foreign Corporation, KEY Foundry Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, KEY sits between Jiangsu XCMG Construction Machinery Research Institute Ltd. (43 patents, rank #7,578) and MEPS Real-time, Inc. (43 patents, rank #7,586) - the closest US assignees by grant volume. The composite Innovation Score of 48.0/100 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. Historical data spans 2020 through 2024, with 43 total grants over that period. 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. KEY Foundry Co., Ltd.'s 17.4 average claims per patent is an average count, not a measure of claim scope, legal strength, enforceability, or design-around risk. The record spans 9 CPC subclasses. Combined with portfolio volume, these figures let readers compare the documented grant records of assignees in similar technology classes.

Who files at KEY's volume?

Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀

patents

What this shows KEY holds 43 patents at rank #7,582, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Source USPTO PatentsView, granted utility patents As of 2015–2025

Companies ranked near KEY

By rank, the assignees closest to #7,582 in granted patent volume.

Leaders in H10D (Inorganic Electric Semiconductor Devices)

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

KEY's Innovation Score vs. every tracked assignee

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

48 Top 17% higher than 83% of 50,000 US assignees

0–10: 687 US assignees (1%). Below this entry. 10–20: 2,527 US assignees (5%). Below this entry. 20–30: 13,162 US assignees (26%). Below this entry. 30–40: 15,294 US assignees (31%). Below this entry. 40–50: 11,491 US assignees (23%). This entry sits in this band. 50–60: 5,058 US assignees (10%). Above this entry. 60–70: 1,537 US assignees (3%). Above this entry. 70–80: 234 US assignees (0%). Above this entry. 80–90: 10 US assignees (0%). Above this entry. 90–100: 0 US assignees (0%). Above this entry. This assignee 0 100 every tracked assignee, bucketed by value

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

05101520 20202021202220232024 3
USPTO utility patent grants by year · 2020–2024

Grants by year

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

View data table
KEY Foundry Co., Ltd. patent grants by year, 2015–2025
Year Patents Granted Share of Period
2020 1 2.3%
2021 13 30.2%
2022 10 23.3%
2023 16 37.2%
2024 3 7.0%

Which technologies does KEY Foundry Co., Ltd. patent most?

Top 9 of 9 technology areas

Grant record at a glance

Portfolio Volume 43 grants
CPC subclasses 9
Avg. claims / grant 17.4

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

Where it ranks

Overall rank by patents

#7,582

of 50,000 tracked assignees

Innovation Score

48.0 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 KEY Foundry Co., Ltd. rank among US patent assignees?
According to USPTO PatentsView (2015–2025 granted utility patents), KEY Foundry Co., Ltd. ranks #7,582 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 KEY Foundry Co., Ltd. hold?
KEY Foundry Co., Ltd. holds 43 US utility patents granted between 2020 and 2024, spanning 9 technology areas.
What is KEY Foundry Co., Ltd.'s Innovation Score?
KEY Foundry Co., Ltd. has an Innovation Score of 48.0 out of 100 (top 17% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does KEY Foundry Co., Ltd. focus on?
KEY Foundry Co., Ltd.'s top technology area is H10D (INORGANIC ELECTRIC SEMICONDUCTOR DEVICES) with 33 patents. Grants appear in 9 CPC subclasses total.
Is KEY Foundry Co., Ltd.'s patent grant rate increasing or decreasing?
Insufficient historical data is available to calculate a velocity trend for KEY Foundry Co., Ltd..
What does claim depth mean for KEY Foundry Co., Ltd.'s patents?
KEY Foundry Co., Ltd.'s patents average 17.4 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 KEY Foundry 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

KEY's 43 grants land it in the top 17% 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 - KEY ranks #7,582 of 50,000. Top 50 holders
  • Most of this portfolio concentrates in H10D - see who else leads that technology area. H10D 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

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.