Where does Ishigaki Company Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Ishigaki Company Limited ranks #35,978 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 Ishigaki Company Limited hold?

Ishigaki Company Limited holds 7 US utility patents granted between 2017 and 2024, spanning 6 technology areas.

What is Ishigaki Company Limited's Innovation Score?

Ishigaki Company Limited has an Innovation Score of 25.6 out of 100 (18th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Ishigaki Company Limited focus on?

Ishigaki Company Limited's top technology area is B01D (Separation) with 7 patents. Grants appear in 6 CPC subclasses total.

Is Ishigaki Company Limited's patent grant rate increasing or decreasing?

Ishigaki Company Limited's recent grant velocity is -25% 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 Ishigaki Company Limited's patents?

Ishigaki Company Limited's patents average 8.9 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 Ishigaki Company Limited 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

Ishigaki Company Limited

USPTO PatentsView assignee record - 7 granted patents across 6 technology areas, recorded in grant years 2017–2024. 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: B01D (Separation).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Ishigaki ranks #35,978 of 49,997 tracked US assignees by granted-patent volume, with 7 patents across 6 technology areas.

#35,978
of 49,997 US assignees by volume: 18th percentile
by Innovation Score (25.6/100): 8.9
avg claims per patent: -25%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R35978 · Foreign Corporation #35,978 · 7 grants

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

GRANTS-MICRO 7 grants
MID-PACK #35,978/49,997
PHOTO-FINISH Iridium Medical…
CPC-NARROW B01D · 6 areas
INNOV-THIN 25.6/100
CLAIMS-PAR 8.9 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -25% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Iridium Medical Technology Co., Ltd. (±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.

Qualcomm Incorporated · highest

85
Ishigaki · this assignee

26
3D Lighting… · lowest

7

What this shows Ishigaki's Innovation Score is 25.6/100 (18th percentile 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.

Where Ishigaki's grants concentrate

Ishigaki Company Limited is a focused PatentsView assignee: 6 CPC subclasses with 100% of grants classified under B01D (Separation). Peak complete grant year is 2019 (2 grants) versus a trough of 1 in 2017. By volume, Ishigaki sits between Iridium Medical Technology Co., Ltd. and Issa Technology Co., Ltd..

Ishigaki's three-year grant acceleration

Ishigaki Company Limited shows 2 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.

Iridium Medical T…

7
Ironclad

7
IRP Nexus Group

7
Isct

7
Ishikawa Energy R…

7
Isodrill

7
Isothrive

7
Issa Technology

7
Ishigaki ◀

7

What this shows Ishigaki holds 7 patents at rank #35,875, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Ishigaki

By rank, the assignees closest to #35,875 in granted patent volume.

Leaders in B01D (Separation)

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

Ishigaki's Innovation Score vs. every tracked assignee

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

26 18th percentile higher than 18% 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 · 2017–2024

Grants by year

Teal-shaded recent years (2020–present) versus the 2017–2019 baseline. Full figures in the table below.

View data table

Ishigaki Company Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2017	1	14.3%
2018	1	14.3%
2019	2	28.6%
2021	1	14.3%
2022	1	14.3%
2024	1	14.3%

Which technologies does Ishigaki Company Limited patent most?

B01D - Separation 7

C02F - Treatment OF Water, Waste Water, Sewage, OR Sludge 5

Y02W - Climate Change Mitigation Technologies Related TO Wastewater Treatment OR Waste Management 3

B30B - Presses IN General 2

D10B - Indexing Scheme Associated With Sublasses OF Section D, Relating TO Textiles 1

D02G - Crimping OR Curling Fibres, Filaments, Threads, OR YARNS; Yarns OR Threads 1

Top 6 of 6 technology areas

Where it ranks

Overall rank by patents

#35,978

of 49,997 tracked assignees

Innovation Score

25.6 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

What to do with this data

Ishigaki Company Limited's patent record in context - here's where to go next.

Ishigaki Company Limited's lead technology class is B01D (Separation), 100% of its portfolio - see every assignee active in that class. Explore B01D
Ranked #35,978 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Ishigaki Company Limited against Iridium Medical Technology Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 25.6/100 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.