Where does Ishikawa Energy Research Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Ishikawa Energy Research Co., Ltd. ranks #35,979 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 Ishikawa Energy Research Co., Ltd. hold?

Ishikawa Energy Research Co., Ltd. holds 7 US utility patents granted between 2020 and 2025, spanning 12 technology areas.

What is Ishikawa Energy Research Co., Ltd.'s Innovation Score?

Ishikawa Energy Research Co., Ltd. has an Innovation Score of 30.6 out of 100 (35th 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 Ishikawa Energy Research Co., Ltd. focus on?

Ishikawa Energy Research Co., Ltd.'s top technology area is B64U (Unmanned Aerial Vehicles [UAV]; Equipment Therefor) with 5 patents, ranking #145 of 545 assignees active in that subclass. Grants appear in 12 CPC subclasses total.

Is Ishikawa Energy Research Co., Ltd.'s patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for Ishikawa Energy Research Co., Ltd..

What does claim depth mean for Ishikawa Energy Research Co., Ltd.'s patents?

Ishikawa Energy Research Co., Ltd.'s patents average 7.4 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 Ishikawa Energy Research 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

Ishikawa Energy Research Co., Ltd.

USPTO PatentsView assignee record - 7 granted patents across 12 technology areas, recorded in grant years 2020–2025. 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: B64U (Unmanned Aerial Vehicles [UAV]; Equipment Therefor).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Ishikawa ranks #35,979 of 49,997 tracked US assignees by granted-patent volume, with 7 patents across 12 technology areas.

#35,979
of 49,997 US assignees by volume: 35th percentile
by Innovation Score (30.6/100): 7.4
avg claims per patent

USPTO PatentsView assignee plate

Corpus R35979 · Foreign Corporation #35,979 · 7 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 7 grants
MID-PACK #35,979/49,997
PHOTO-FINISH Ironclad
CPC-FOCUS B64U · 12 areas
INNOV-THIN 30.6/100
CLAIMS-SPARSE 7.4 claims/avg
TYPE-FRNCORP Foreign Corp
SPAN-YRS 2020–2025 · 6y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Ironclad, Inc. (±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 Ishikawa’s 30.6 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 7.2 pts (24%) Velocity 6.7 pts (22%) Breadth 12.2 pts (40%) Claim depth 4.5 pts (15%)

Qualcomm Incorporated · highest

85
Ishikawa Energy… · this assignee

31
3D Lighting… · lowest

7

What this shows Ishikawa's Innovation Score is 30.6/100 (35th 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.

Does more volume mean deeper claims for Ishikawa?

Each dot is one of Ishikawa’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). Ishikawa’s own 7.4 claims/patent is at or below the 19.0 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Ishikawa's grants concentrate

Ishikawa Energy Research Co., Ltd. is a focused PatentsView assignee: 12 CPC subclasses with 71.4% of grants classified under B64U (Unmanned Aerial Vehicles [UAV]; Equipment Therefor). By volume, Ishikawa sits between Ironclad, Inc. and Isuturing, LLC.

Ishikawa's three-year grant acceleration

Ishikawa Energy Research Co., Ltd. shows 1 grants in 2022–2024 against only 1 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.

Ironclad

7
IRP Nexus Group

7
Isct

7
Ishigaki

7
Isodrill

7
Isothrive

7
Issa Technology

7
Isuturing

7
Ishikawa Energy R… ◀

7

What this shows Ishikawa holds 7 patents at rank #35,876, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Ishikawa

By rank, the assignees closest to #35,876 in granted patent volume.

Leaders in B64U (Unmanned Aerial Vehicles [UAV])

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

Ishikawa's Innovation Score vs. every tracked assignee

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

31 35th percentile higher than 35% 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 · 2020–2025

Grants by year

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

View data table

Ishikawa Energy Research Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2020	1	14.3%
2024	1	14.3%
2025partial year	5	71.4%

Which technologies does Ishikawa Energy Research Co., Ltd. patent most?

B64U - Unmanned Aerial Vehicles [UAV]; Equipment Therefor 5

B64C - AEROPLANES; Helicopters 4

Y02T - Climate Change Mitigation Technologies Related TO Transportation 4

F02B - Internal-combustion Piston ENGINES; Combustion Engines IN General 3

B64D - Equipment FOR Fitting IN OR TO AIRCRAFT; Flight SUITS; PARACHUTES; Arrangement OR Mounting OF Power Plants OR Propulsion Transmissions IN Aircraft 2

G05D - Systems FOR Controlling OR Regulating Non-electric Variables 1

G01G - Weighing 1

F02F - Cylinders, Pistons OR Casings, FOR Combustion ENGINES; Arrangements OF Sealings IN Combustion Engines 1

F01B - Machines OR Engines, IN General OR OF Positive-displacement Type, e.g. Steam Engines 1

F01L - Cyclically Operating Valves FOR Machines OR Engines 1

F01M - Lubricating OF Machines OR Engines IN GENERAL; Lubricating Internal Combustion ENGINES; Crankcase Ventilating 1

H02K - Dynamo-electric Machines 1

Top 12 of 12 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

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

Ishikawa Energy Research Co., Ltd.'s lead technology class is B64U (Unmanned Aerial Vehicles [UAV]; Equipment Therefor), 71.4% of its portfolio - see every assignee active in that class. Explore B64U
Ranked #35,979 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Ishikawa Energy Research Co., Ltd. against Ironclad, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 30.6/100 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.