PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

CKD Corporation

USPTO PatentsView assignee record - 170 granted patents across 64 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: F16K (VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING).

Explore the portfolio See the ranking
170
Total patents granted
64
CPC technology areas
9.7
Avg claims per patent
+74%
5-year filing velocity

The verdict

CKD holds 170 US patents across 64 technology areas, rank #2,296 of 50,000 tracked assignees.

#2,296
of 50,000 US assignees by volume
Top 9%
by Innovation Score (53.3/100)
9.7
avg claims per patent
+74%
filing velocity, last 5 yrs

Portfolio overview

CKD Corporation has been granted 170 US utility patents between 2015 and 2025, placing CKD Corporation at rank #2,296 across all assignees tracked by PlainPatent. This portfolio spans 64 distinct Cooperative Patent Classification (CPC) subclasses, averaging 9.7 claims per patent with primary concentration in F16K (VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING). As a Foreign Corporation, CKD Corporation is one of the broader-portfolio assignees in the PatentsView dataset. By volume, CKD sits between Shanghai Zhaoxin Semiconductor Co., Ltd. (171 patents, rank #2,292) and Metaswitch Networks Ltd. (170 patents, rank #2,300) - the closest US assignees by grant volume. The composite Innovation Score of 53.3/100 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 108 grants, compared with 62 in the 2015–2019 window, a +74% shift in five-year velocity. An acceleration of this magnitude signals aggressive R&D investment and expanding technical ambition. 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. CKD Corporation's 9.7 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 64 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark CKD Corporation against peers pursuing similar technology classes.

Who files at CKD's volume?

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

patents

What this shows CKD holds 170 patents at rank #2,296, 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 CKD

By rank, the assignees closest to #2,296 in granted patent volume.

Leaders in F16K (Valves)

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

CKD's Innovation Score vs. every tracked assignee

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

53 Top 9% higher than 91% 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%). Below this entry. 50–60: 5,058 US assignees (10%). This entry sits in this band. 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

051015202530 20152016201720182019202020212022202320242025 16
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
CKD Corporation patent grants by year, 2015–2025
Year Patents Granted Share of Period
2015 11 6.5%
2016 18 10.6%
2017 5 2.9%
2018 10 5.9%
2019 18 10.6%
2020 19 11.2%
2021 27 15.9%
2022 17 10.0%
2023 13 7.6%
2024 16 9.4%
2025 16 9.4%

Which technologies does CKD Corporation patent most?

Top 15 of 64 technology areas

Patent Moat Analysis

Portfolio Volume Moderate
Tech Breadth Multi-domain
Claim Depth Simple
Velocity Accelerating

Where it ranks

Overall rank by patents

#2,296

Across all tracked assignees

Innovation Score

53.3 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 CKD Corporation hold?
CKD Corporation holds 170 US granted patents filed between 2015 and 2025, spanning 64 technology areas.
What is CKD Corporation's Innovation Score?
CKD Corporation has an Innovation Score of 53.3 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does CKD Corporation focus on?
CKD Corporation's top technology area is F16K (VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING) with 52 patents. The company has filed patents in 64 CPC subclasses total.
Is CKD Corporation's patent filing rate increasing or decreasing?
CKD Corporation's recent filing velocity is +74% compared to the prior five-year period. This indicates accelerating innovation.
What does claim depth mean for CKD Corporation's patents?
CKD Corporation's patents average 9.7 claims each. This is relatively simple claim structure, typical for focused inventions.
How is the CKD 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

CKD's 170 grants land it in the top 9% 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 - CKD ranks #2,296 of 50,000. Top 50 holders
  • Most of this portfolio concentrates in F16K - see who else leads that technology area. F16K 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

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.