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

According to USPTO PatentsView (2015–2025 granted utility patents), Kotobuki Tsushou Co., Ltd. ranks #48,219 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 Kotobuki Tsushou Co., Ltd. hold?

Kotobuki Tsushou Co., Ltd. holds 5 US utility patents granted between 2018 and 2020, spanning 6 technology areas.

What is Kotobuki Tsushou Co., Ltd.'s Innovation Score?

Kotobuki Tsushou Co., Ltd. has an Innovation Score of 19.3 out of 100 (6th 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 Kotobuki Tsushou Co., Ltd. focus on?

Kotobuki Tsushou Co., Ltd.'s top technology area is B01D (Separation) with 5 patents, ranking #948 of 3,536 assignees active in that subclass. Grants appear in 6 CPC subclasses total.

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

Kotobuki Tsushou Co., Ltd.'s recent grant velocity is -75% 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 Kotobuki Tsushou Co., Ltd.'s patents?

Kotobuki Tsushou 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 Kotobuki Tsushou 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

Kotobuki Tsushou Co., Ltd.

USPTO PatentsView assignee record - 5 granted patents across 6 technology areas, recorded in grant years 2018–2020. 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, Kotobuki ranks #48,219 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 6 technology areas.

#48,219
of 49,997 US assignees by volume: 6th percentile
by Innovation Score (19.3/100): 7.4
avg claims per patent: -75%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R48219 · Foreign Corporation #48,219 · 5 grants

GRANTS-MICRO · BOTTOM-DECILE · PHOTO-FINISH · CPC-NARROW · INNOV-LOW · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 5 grants
BOTTOM-DECILE #48,219/49,997
PHOTO-FINISH Kone Elevators
CPC-NARROW B01D · 6 areas
INNOV-LOW 19.3/100
CLAIMS-SPARSE 7.4 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -75% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Kone Elevators 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.

How Kotobuki’s 19.3 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 6.2 pts (32%) Velocity 0.0 pts (0%) Breadth 8.7 pts (45%) Claim depth 4.4 pts (23%)

Qualcomm Incorporated · highest

85
Kotobuki Tsushou · this assignee

19
3D Lighting… · lowest

7

What this shows Kotobuki's Innovation Score is 19.3/100 (6th 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 Kotobuki?

Each dot is one of Kotobuki’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). Kotobuki’s own 7.4 claims/patent is at or below the 11.4 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Kotobuki's grants concentrate

Kotobuki Tsushou Co., Ltd. is a focused PatentsView assignee: 6 CPC subclasses with 100% of grants classified under B01D (Separation). Peak complete grant year is 2019 (3 grants) versus a trough of 1 in 2018. By volume, Kotobuki sits between Kone Elevators Co. Ltd and Kraussmaffei Extrusion GMBH.

Kone Elevators

5
Korea (Center FOR…

5
Koros Technology…

5
Korro BIO

5
KPC Pharmaceutica…

5
Kragsac

5
Krallmann Kunstst…

5
Kraussmaffei Extr…

5
Kotobuki Tsushou ◀

5

What this shows Kotobuki holds 5 patents at rank #48,137, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Kotobuki

By rank, the assignees closest to #48,137 in granted patent volume.

Leaders in B01D (Separation)

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

Kotobuki's Innovation Score vs. every tracked assignee

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

19 6th percentile higher than 6% 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 · 2018–2020

Grants by year

Teal-shaded recent years (2020–present) versus the 2018–2019 baseline. Full figures in the table below.

View data table

Kotobuki Tsushou Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	1	20.0%
2019	3	60.0%
2020	1	20.0%

Which technologies does Kotobuki Tsushou Co., Ltd. patent most?

B01D - Separation 5

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 4

B05D - Processes FOR Applying Fluent Materials TO Surfaces, IN General 1

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 1

G03F - Photomechanical Production OF Textured OR Patterned Surfaces, e.g. FOR Printing, FOR Processing OF Semiconductor DEVICES; Materials THEREFOR; Originals THEREFOR; Apparatus Specially Adapted THEREFOR; 1

C02F - Treatment OF Water, Waste Water, Sewage, OR Sludge 1

Top 6 of 6 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

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

Kotobuki Tsushou Co., Ltd.'s lead technology class is B01D (Separation), 100% of its portfolio - see every assignee active in that class. Explore B01D
Ranked #48,219 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Kotobuki Tsushou Co., Ltd. against Kone Elevators Co. Ltd, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 19.3/100 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.