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

According to USPTO PatentsView (2015–2025 granted utility patents), Nagaki Seiki Co., Ltd. ranks #8,880 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 Nagaki Seiki Co., Ltd. hold?

Nagaki Seiki Co., Ltd. holds 36 US utility patents granted between 2015 and 2024, spanning 15 technology areas.

What is Nagaki Seiki Co., Ltd.'s Innovation Score?

Nagaki Seiki Co., Ltd. has an Innovation Score of 30.4 out of 100 (34th 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 Nagaki Seiki Co., Ltd. focus on?

Nagaki Seiki Co., Ltd.'s top technology area is H02G (Installation OF Electric Cables OR Lines, OR OF Combined Optical AND Electric Cables OR Lines) with 15 patents, ranking #62 of 985 assignees active in that subclass. Grants appear in 15 CPC subclasses total.

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

Nagaki Seiki Co., Ltd.'s recent grant velocity is -11% 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 Nagaki Seiki Co., Ltd.'s patents?

Nagaki Seiki Co., Ltd.'s patents average 3.7 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 Nagaki Seiki 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

Nagaki Seiki Co., Ltd.

USPTO PatentsView assignee record - 36 granted patents across 15 technology areas, recorded in grant years 2015–2024. 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: H02G (Installation OF Electric Cables OR Lines, OR OF Combined Optical AND Electric Cables OR Lines).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Nagaki ranks #8,880 of 49,997 tracked US assignees by granted-patent volume, with 36 patents across 15 technology areas.

#8,880
of 49,997 US assignees by volume: 34th percentile
by Innovation Score (30.4/100): 3.7
avg claims per patent: -11%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R8880 · Foreign Corporation #8,880 · 36 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-SMALL 36 grants
UPPER-Q #8,880/49,997
PHOTO-FINISH Metso Outotec…
CPC-FOCUS H02G · 15 areas
INNOV-THIN 30.4/100
CLAIMS-SPARSE 3.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -11% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Metso Outotec Finland Oy (±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 Nagaki’s 30.4 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 12.5 pts (41%) Velocity 2.0 pts (7%) Breadth 13.7 pts (45%) Claim depth 2.2 pts (7%)

Qualcomm Incorporated · highest

85
Exact Sciences… · near

30
Ojai Retinal… · near

30
SugarCRM · near

30
Valentino S p A · near

30
Nagaki Seiki · this assignee

30
3D Lighting… · lowest

7

What this shows Nagaki's Innovation Score is 30.4/100 (34th 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 Nagaki?

Each dot is one of Nagaki’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). Nagaki’s own 3.7 claims/patent is at or below the 9.5 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Nagaki's grants concentrate

Nagaki Seiki Co., Ltd. is a focused PatentsView assignee: 15 CPC subclasses with 41.7% of grants classified under H02G (Installation OF Electric Cables OR Lines, OR OF Combined Optical AND Electric Cables OR Lines). Peak complete grant year is 2019 (13 grants) versus a trough of 1 in 2015. By volume, Nagaki sits between Metso Outotec Finland Oy and Neocific, Inc..

Nagaki's three-year grant acceleration

From 2019–2021 to 2022–2024, Nagaki Seiki Co., Ltd. moved from 23 to 7 grants (0.30x the prior three-year total, a multiple, not a CAGR). See the growth leaderboard.

Metso Outotec Fin…

36
Mitsui Engineerin…

36
Mortarless

36
Multimatic

36
Nexter Systems

36
Nidec Servo

36
National Universi…

36
Neocific

36
Nagaki Seiki ◀

36

What this shows Nagaki holds 36 patents at rank #8,879, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Nagaki

By rank, the assignees closest to #8,879 in granted patent volume.

Leaders in H02G (Installation OF Electric Cables OR Lines)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Nagaki, neither rank-band nor same-CPC leaders (those blocks stay above). In H02G (Installation OF Electric Cables OR Lines), Nagaki ranks #62 of 985 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (30 here).

Exact Sciences Development Company, LLC 30 SugarCRM, Inc. 30 Ojai Retinal Technology, LLC 30 Valentino S.p.A. 30

Nagaki's Innovation Score vs. every tracked assignee

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

30 34th percentile higher than 34% 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 · 2015–2024

Grants by year

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

View data table

Nagaki Seiki Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	2.8%
2016	3	8.3%
2017	2	5.6%
2019	13	36.1%
2020	7	19.4%
2021	3	8.3%
2022	3	8.3%
2023	2	5.6%
2024	2	5.6%

Which technologies does Nagaki Seiki Co., Ltd. patent most?

H02G - Installation OF Electric Cables OR Lines, OR OF Combined Optical AND Electric Cables OR Lines 15

F16B - Devices FOR Fastening OR Securing Constructional Elements OR Machine Parts Together, e.g. Nails, Bolts, Circlips, Clamps, Clips OR WEDGES; Joints OR Jointing 6

B25B - Tools OR Bench Devices NOT Otherwise Provided FOR, FOR Fastening, Connecting, Disengaging OR Holding 5

A62B - Devices, Apparatus OR Methods FOR Life-saving 3

Y10T - Technical Subjects Covered BY Former US Classification 3

F16G - Belts, Cables, OR Ropes, Predominantly Used FOR Driving PURPOSES; CHAINS; Fittings Predominantly Used Therefor 2

B66F - Hoisting, Lifting, Hauling OR Pushing, NOT Otherwise Provided FOR, e.g. Devices Which Apply A Lifting OR Pushing Force Directly TO THE Surface OF A Load 1

B25H - Workshop Equipment, e.g. FOR Marking-out WORK; Storage Means FOR Workshops 1

B25G - Handles FOR Hand Implements 1

B26B - Hand-held Cutting Tools NOT Otherwise Provided FOR 1

B26D - CUTTING; Details Common TO Machines FOR Perforating, Punching, Cutting-out, Stamping-out OR Severing 1

B25J - MANIPULATORS; Chambers Provided With Manipulation Devices 1

G05G - Control Devices OR Systems Insofar AS Characterised BY Mechanical Features Only 1

H01R - Electrically-conductive CONNECTIONS; Structural Associations OF A Plurality OF Mutually-insulated Electrical Connecting ELEMENTS; Coupling DEVICES; Current Collectors 1

B65H - Handling Thin OR Filamentary Material, e.g. Sheets, Webs, Cables 1

Top 15 of 15 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

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

Nagaki Seiki Co., Ltd.'s lead technology class is H02G (Installation OF Electric Cables OR Lines, OR OF Combined Optical AND Electric Cables OR Lines), 41.7% of its portfolio - see every assignee active in that class. Explore H02G
Ranked #8,880 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Nagaki Seiki Co., Ltd. against Metso Outotec Finland Oy, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 30.4/100 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.