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

According to USPTO PatentsView (2015–2025 granted utility patents), Tounetsu Co., Ltd. ranks #37,997 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 Tounetsu Co., Ltd. hold?

Tounetsu Co., Ltd. holds 7 US utility patents granted between 2017 and 2025, spanning 9 technology areas.

What is Tounetsu Co., Ltd.'s Innovation Score?

Tounetsu Co., Ltd. has an Innovation Score of 25.3 out of 100 (17th 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 Tounetsu Co., Ltd. focus on?

Tounetsu Co., Ltd.'s top technology area is B22D (Casting OF METALS; Casting OF Other Substances BY THE Same Processes OR Devices) with 6 patents, ranking #64 of 377 assignees active in that subclass. Grants appear in 9 CPC subclasses total.

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

Tounetsu Co., Ltd.'s recent grant velocity is +0% compared to the prior five-year period (grant years, not application filing dates). The company is maintaining or growing its granted-patent output.

What does claim depth mean for Tounetsu Co., Ltd.'s patents?

Tounetsu Co., Ltd.'s patents average 5.1 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 Tounetsu 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

Tounetsu Co., Ltd.

USPTO PatentsView assignee record - 7 granted patents across 9 technology areas, recorded in grant years 2017–2025. 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: B22D (Casting OF METALS; Casting OF Other Substances BY THE Same Processes OR Devices).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Tounetsu ranks #37,997 of 49,997 tracked US assignees by granted-patent volume, with 7 patents across 9 technology areas.

#37,997
of 49,997 US assignees by volume: 17th percentile
by Innovation Score (25.3/100): 5.1
avg claims per patent: +0%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R37997 · Foreign Corporation #37,997 · 7 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-FLAT · BOOK-FULL

GRANTS-MICRO 7 grants
LOWER-Q #37,997/49,997
PHOTO-FINISH TORQ/LITE
CPC-NARROW B22D · 9 areas
INNOV-THIN 25.3/100
CLAIMS-SPARSE 5.1 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-FLAT +0% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: TORQ/LITE, LLC (±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 Tounetsu’s 25.3 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 (28%) Velocity 4.4 pts (17%) Breadth 10.6 pts (42%) Claim depth 3.1 pts (12%)

Qualcomm Incorporated · highest

85
Tounetsu · this assignee

25
3D Lighting… · lowest

7

What this shows Tounetsu's Innovation Score is 25.3/100 (17th 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 Tounetsu?

Each dot is one of Tounetsu’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). Tounetsu’s own 5.1 claims/patent is at or below the 11.6 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Tounetsu's grants concentrate

Tounetsu Co., Ltd. is a focused PatentsView assignee: 9 CPC subclasses with 85.7% of grants classified under B22D (Casting OF METALS; Casting OF Other Substances BY THE Same Processes OR Devices). Peak complete grant year is 2019 (2 grants) versus a trough of 1 in 2017. By volume, Tounetsu sits between TORQ/LITE, LLC and Tpcera Ltd..

Tounetsu's three-year grant acceleration

Tounetsu Co., Ltd. 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.

TORQ/LITE

7
Torque-tech Preci…

7
Toshiba America R…

7
TotalfÖRsvarets F…

7
Toyo Electric MFG

7
Toyota Battery

7
Toyota Boshoku Am…

7
Tpcera

7
Tounetsu ◀

7

What this shows Tounetsu holds 7 patents at rank #37,872, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Tounetsu

By rank, the assignees closest to #37,872 in granted patent volume.

Leaders in B22D (Casting OF Metals)

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

Tounetsu's Innovation Score vs. every tracked assignee

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

25 17th percentile higher than 17% 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 · 2017–2025

Grants by year

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

View data table

Tounetsu Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2017	1	14.3%
2019	2	28.6%
2021	1	14.3%
2022	1	14.3%
2023	1	14.3%
2025partial year	1	14.3%

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

B22D - Casting OF METALS; Casting OF Other Substances BY THE Same Processes OR Devices 6

F27D - Details OR Accessories OF Furnaces, Kilns, Ovens OR Retorts, IN SO FAR AS They ARE OF Kinds Occurring IN More Than ONE Kind OF Furnace 5

F27B - Furnaces, Kilns, Ovens OR Retorts IN GENERAL; Open Sintering OR Like Apparatus 5

H05B - Electric HEATING; Electric Light Sources NOT Otherwise Provided FOR; Circuit Arrangements FOR Electric Light Sources, IN General 2

F22B - Methods OF Steam GENERATION; Steam Boilers 2

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 1

C22B - Production AND Refining OF Metals ; Pretreatment OF RAW Materials 1

F23D - Burners 1

F23M - Casings, Linings, Walls OR Doors Specially Adapted FOR Combustion Chambers, e.g. FIREBRIDGES; Devices FOR Deflecting AIR, Flames OR Combustion Products IN Combustion CHAMBERS; Safety Arrangements Specially Adapted FOR Combustion APPARATUS; Details OF Combustion Chambers, NOT Otherwise Provided FOR 1

Top 9 of 9 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

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

Tounetsu Co., Ltd.'s lead technology class is B22D (Casting OF METALS; Casting OF Other Substances BY THE Same Processes OR Devices), 85.7% of its portfolio - see every assignee active in that class. Explore B22D
Ranked #37,997 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Tounetsu Co., Ltd. against TORQ/LITE, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 25.3/100 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.