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

According to USPTO PatentsView (2015–2025 granted utility patents), Dorco Co., Ltd. ranks #2,656 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 Dorco Co., Ltd. hold?

Dorco Co., Ltd. holds 146 US utility patents granted between 2015 and 2025, spanning 8 technology areas.

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

Dorco Co., Ltd. has an Innovation Score of 40.3 out of 100 (top 36% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Dorco Co., Ltd. focus on?

Dorco Co., Ltd.'s top technology area is B26B (Hand-held Cutting Tools NOT Otherwise Provided FOR) with 70 patents, ranking #5 of 239 assignees active in that subclass. Grants appear in 8 CPC subclasses total.

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

Dorco Co., Ltd.'s recent grant velocity is +186% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

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

Dorco Co., Ltd.'s patents average 6.8 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 Dorco 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

Dorco Co., Ltd.

USPTO PatentsView assignee record - 146 granted patents across 8 technology areas, recorded in grant years 2015–2025. 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: B26B (Hand-held Cutting Tools NOT Otherwise Provided FOR).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Dorco ranks #2,656 of 49,997 tracked US assignees by granted-patent volume, with 146 patents across 8 technology areas.

#2,656
of 49,997 US assignees by volume: Top 36%
by Innovation Score (40.3/100): 6.8
avg claims per patent: +186%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R2656 · Foreign Corporation #2,656 · 146 grants

GRANTS-MID · TOP-DECILE · PHOTO-FINISH · CPC-NARROW · INNOV-PAR · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-MID 146 grants
TOP-DECILE #2,656/49,997
PHOTO-FINISH Akzo Nobel Chemicals…
CPC-NARROW B26B · 8 areas
INNOV-PAR 40.3/100
CLAIMS-SPARSE 6.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +186% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Akzo Nobel Chemicals International B.V (±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 Dorco’s 40.3 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 17.2 pts (43%) Velocity 9.0 pts (22%) Breadth 10.0 pts (25%) Claim depth 4.1 pts (10%)

Qualcomm Incorporated · highest

85
Amgen Research… · near

40
Dorco · this assignee

40
Össur Iceland ehf · near

40
Paul Hartmann · near

40
Silgan White Cap · near

40
3D Lighting… · lowest

7

What this shows Dorco's Innovation Score is 40.3/100 (top 36% 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 Dorco?

Each dot is one of Dorco’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). Dorco’s own 6.8 claims/patent is at or below the 12.9 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Dorco's grants concentrate

Dorco Co., Ltd. is a focused PatentsView assignee: 8 CPC subclasses with 47.9% of grants classified under B26B (Hand-held Cutting Tools NOT Otherwise Provided FOR). Peak complete grant year is 2022 (25 grants) versus a trough of 3 in 2017. By volume, Dorco sits between Assa Abloy Americas Residential Inc. and Joseph Voegele AG.

Dorco's three-year grant acceleration

From 2019–2021 to 2022–2024, Dorco Co., Ltd. moved from 46 to 62 grants (1.35x the prior three-year total, a multiple, not a CAGR). Among 3,296 tracked assignees with ≥100 grants and ≥20 prior-period grants, that multiple ranks #582. See the growth leaderboard.

Assa Abloy Americ…

146
Akzo Nobel Chemic…

146
Alexion Pharmaceu…

146
Brita

146
FMC

146
Herman Miller

146
IPG Photonics

146
Joseph Voegele

146
Dorco ◀

146

What this shows Dorco holds 146 patents at rank #2,656, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Dorco

By rank, the assignees closest to #2,656 in granted patent volume.

Leaders in B26B (Hand-held Cutting Tools)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Dorco, neither rank-band nor same-CPC leaders (those blocks stay above). In B26B (Hand-held Cutting Tools), Dorco ranks #5 of 239 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (40 here).

Silgan White Cap LLC 40 Amgen Research (MUNICH) GMBH 40 Össur Iceland ehf 40 Paul Hartmann AG 40

Similar claim depth

Nearest assignees by average claims per patent (6.8 here).

AS America, Inc. 6.8 avg Citizen Watch Co., Ltd. 6.8 avg Hyosung TNS Inc. 6.8 avg Duquesne University of the Holy Spirit 6.8 avg

Dorco's Innovation Score vs. every tracked assignee

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

40 Top 36% higher than 64% 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 · 2015–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Dorco Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	4	2.7%
2016	8	5.5%
2017	3	2.1%
2018	12	8.2%
2019	8	5.5%
2020	20	13.7%
2021	18	12.3%
2022	25	17.1%
2023	19	13.0%
2024	18	12.3%
2025partial year	11	7.5%

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

B26B - Hand-held Cutting Tools NOT Otherwise Provided FOR 70

C23C - Coating Metallic MATERIAL; Coating Material With Metallic MATERIAL; Surface Treatment OF Metallic Material BY Diffusion Into THE Surface, BY Chemical Conversion OR SUBSTITUTION; Coating BY Vacuum Evaporation, BY Sputtering, BY ION Implantation OR BY Chemical Vapour Deposition, IN General 5

Y10T - Technical Subjects Covered BY Former US Classification 2

B05B - Spraying APPARATUS; Atomising APPARATUS; Nozzles 1

A45D - Hairdressing OR Shaving Equipment ; Equipment FOR Cosmetics OR Cosmetic Treatments, e.g. FOR Manicuring OR Pedicuring 1

A61Q - Specific USE OF Cosmetics OR Similar Toiletry Preparations 1

A61K - Preparations FOR Medical, Dental OR Toiletry Purposes 1

B65D - Containers FOR Storage OR Transport OF Articles OR Materials, e.g. Bags, Barrels, Bottles, Boxes, Cans, Cartons, Crates, Drums, Jars, Tanks, Hoppers, Forwarding CONTAINERS; Accessories, Closures, OR Fittings THEREFOR; Packaging ELEMENTS; Packages 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

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

Dorco Co., Ltd.'s lead technology class is B26B (Hand-held Cutting Tools NOT Otherwise Provided FOR), 47.9% of its portfolio - see every assignee active in that class. Explore B26B
Ranked #2,656 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Dorco Co., Ltd. against Assa Abloy Americas Residential Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 40.3/100 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.