PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Ichikawa Co., Ltd.

USPTO PatentsView assignee record - 23 granted patents across 8 technology areas, active 2015–2024. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: D21F (PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON).

Explore the portfolio See the ranking
23
Total patents granted
8
CPC technology areas
10.7
Avg claims per patent
-36%
5-year filing velocity

The verdict

Ichikawa holds 23 US patents across 8 technology areas, rank #12,974 of 50,000 tracked assignees.

#12,974
of 50,000 US assignees by volume
Top 24%
by Innovation Score (45.1/100)
10.7
avg claims per patent
-36%
filing velocity, last 5 yrs

Portfolio overview

Ichikawa Co., Ltd. has been granted 23 US utility patents between 2015 and 2024, placing Ichikawa Co., Ltd. at rank #12,974 across all assignees tracked by PlainPatent. This portfolio spans 8 distinct Cooperative Patent Classification (CPC) subclasses, averaging 10.7 claims per patent with primary concentration in D21F (PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON). As a Foreign Corporation, Ichikawa Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, Ichikawa sits between Hitachi Data Systems Engineering UK Limited (23 patents, rank #12,970) and INNO Instrument (china) Inc. (23 patents, rank #12,978) - the closest US assignees by grant volume. The composite Innovation Score of 45.1/100 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 9 grants, compared with 14 in the 2015–2019 window, a -36% 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. Ichikawa Co., Ltd.'s 10.7 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while concentration in 8 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Ichikawa Co., Ltd. against peers pursuing similar technology classes.

Who files at Ichikawa's volume?

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

patents

What this shows Ichikawa holds 23 patents at rank #12,974, 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 Ichikawa

By rank, the assignees closest to #12,974 in granted patent volume.

Leaders in D21F (Paper-making Machines)

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

Ichikawa's Innovation Score vs. every tracked assignee

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

45 Top 24% higher than 76% 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

0123456 20152016201720182019202020232024 4
USPTO utility patent grants by year · 2015–2024

Grants by year

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

View data table
Ichikawa Co., Ltd. patent grants by year, 2015–2025
Year Patents Granted Share of Period
2015 2 8.7%
2016 1 4.3%
2017 5 21.7%
2018 4 17.4%
2019 2 8.7%
2020 1 4.3%
2023 4 17.4%
2024 4 17.4%

Which technologies does Ichikawa Co., Ltd. patent most?

Top 8 of 8 technology areas

Patent Moat Analysis

Portfolio Volume Light
Tech Breadth Focused
Claim Depth Simple
Velocity Declining

Where it ranks

Overall rank by patents

#12,974

Across all tracked assignees

Innovation Score

45.1 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 Ichikawa Co., Ltd. hold?
Ichikawa Co., Ltd. holds 23 US granted patents filed between 2015 and 2024, spanning 8 technology areas.
What is Ichikawa Co., Ltd.'s Innovation Score?
Ichikawa Co., Ltd. has an Innovation Score of 45.1 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does Ichikawa Co., Ltd. focus on?
Ichikawa Co., Ltd.'s top technology area is D21F (PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON) with 23 patents. The company has filed patents in 8 CPC subclasses total.
Is Ichikawa Co., Ltd.'s patent filing rate increasing or decreasing?
Ichikawa Co., Ltd.'s recent filing velocity is -36% compared to the prior five-year period. Filing activity has slowed relative to earlier years.
What does claim depth mean for Ichikawa Co., Ltd.'s patents?
Ichikawa Co., Ltd.'s patents average 10.7 claims each. This is relatively simple claim structure, typical for focused inventions.
How is the Ichikawa 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

Ichikawa's 23 grants land it in the top 24% 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 - Ichikawa ranks #12,974 of 50,000. Top 50 holders
  • Most of this portfolio concentrates in D21F - see who else leads that technology area. D21F 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.