Where does Ichikawa Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Ichikawa Co., Ltd. ranks #12,976 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Ichikawa Co., Ltd. hold?

Ichikawa Co., Ltd. holds 23 US utility patents granted 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 (top 24% of the corpus). This composite metric weighs portfolio volume (40%), grant 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, ranking #8 of 93 assignees active in that subclass. Grants appear in 8 CPC subclasses total.

Is Ichikawa Co., Ltd.'s patent grant rate increasing or decreasing?

Ichikawa Co., Ltd.'s recent grant velocity is -36% 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 Ichikawa Co., Ltd.'s patents?

Ichikawa Co., Ltd.'s patents average 10.7 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 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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Ichikawa Co., Ltd.

USPTO PatentsView assignee record - 23 granted patents across 8 technology areas, recorded in grant years 2015–2024. 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: D21F (Paper-making MACHINES; Methods OF Producing Paper Thereon).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Ichikawa ranks #12,976 of 49,997 tracked US assignees by granted-patent volume, with 23 patents across 8 technology areas.

#12,976
of 49,997 US assignees by volume: Top 24%
by Innovation Score (45.1/100): 10.7
avg claims per patent: -36%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R12976 · Foreign Corporation #12,976 · 23 grants

GRANTS-SMALL · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-SMALL 23 grants
MID-PACK #12,976/49,997
PHOTO-FINISH Hitachi Data…
CPC-NARROW D21F · 8 areas
INNOV-PAR 45.1/100
CLAIMS-PAR 10.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -36% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Hitachi Data Systems Engineering UK Limited (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How Ichikawa’s 45.1 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 11.0 pts (24%) Velocity 17.8 pts (39%) Breadth 10.0 pts (22%) Claim depth 6.4 pts (14%)

Qualcomm Incorporated · highest

85
Ichikawa · this assignee

45
3D Lighting… · lowest

7

What this shows Ichikawa's Innovation Score is 45.1/100 (top 24% of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for Ichikawa?

Each dot is one of Ichikawa’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). Ichikawa’s own 10.7 claims/patent is at or below the 15.5 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

Ichikawa vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where Ichikawa's grants concentrate

Ichikawa Co., Ltd. is a focused PatentsView assignee: 8 CPC subclasses with 100% of grants classified under D21F (Paper-making MACHINES; Methods OF Producing Paper Thereon). Peak complete grant year is 2017 (5 grants) versus a trough of 1 in 2016. By volume, Ichikawa sits between Hitachi Data Systems Engineering UK Limited and Inno Instrument (CHINA) Inc..

Ichikawa's three-year grant acceleration

Ichikawa Co., Ltd. shows 8 grants in 2022–2024 against only 3 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Hitachi Data Syst…

23
Hong Kong Ecoaqua

23
Hop Breeding L L C

23
Hyland Software

23
IEX Group

23
Imagekeeper

23
IMS Nanofabricati…

23
Inno Instrument (…

23
Ichikawa ◀

23

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.

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, grant velocity, technology breadth, and claim depth (0–100)

45 Top 24% higher than 76% of 49,997 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 · 2015–2024

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?

D21F - Paper-making MACHINES; Methods OF Producing Paper Thereon 23

C08G - Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds 6

B29C - Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing 3

B32B - Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form 2

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 2

C08L - Compositions OF Macromolecular Compounds 1

D04H - Making Textile Fabrics, e.g. From Fibres OR Filamentary Material ; Fabrics Made BY Such Processes OR Apparatus, e.g. Felts, Non-woven FABRICS; COTTON-WOOL; Wadding ; ; Non-woven Fabrics From Staple Fibres, Filaments OR Yarns, Bonded With AT Least ONE Web-like Material During Their Consolidation 1

D06H - Marking, Inspecting, Seaming OR Severing Textile Materials 1

Top 8 of 8 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

Ichikawa Co., Ltd.'s patent record in context - here's where to go next.

Ichikawa Co., Ltd.'s lead technology class is D21F (Paper-making MACHINES; Methods OF Producing Paper Thereon), 100% of its portfolio - see every assignee active in that class. Explore D21F
Ranked #12,976 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Ichikawa Co., Ltd. against Hitachi Data Systems Engineering UK Limited, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 45.1/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

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.