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

According to USPTO PatentsView (2015–2025 granted utility patents), Kitagawa Ironworks Co., Ltd. ranks #19,982 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 Kitagawa Ironworks Co., Ltd. hold?

Kitagawa Ironworks Co., Ltd. holds 14 US utility patents granted between 2019 and 2025, spanning 7 technology areas.

What is Kitagawa Ironworks Co., Ltd.'s Innovation Score?

Kitagawa Ironworks Co., Ltd. has an Innovation Score of 25.0 out of 100 (16th 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 Kitagawa Ironworks Co., Ltd. focus on?

Kitagawa Ironworks Co., Ltd.'s top technology area is B23B (TURNING; Boring) with 12 patents, ranking #40 of 490 assignees active in that subclass. Grants appear in 7 CPC subclasses total.

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

Kitagawa Ironworks Co., Ltd.'s recent grant velocity is +1000% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

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

Kitagawa Ironworks 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 Kitagawa Ironworks 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

Kitagawa Ironworks Co., Ltd.

USPTO PatentsView assignee record - 14 granted patents across 7 technology areas, recorded in grant years 2019–2025. 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: B23B (TURNING; Boring).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Kitagawa ranks #19,982 of 49,997 tracked US assignees by granted-patent volume, with 14 patents across 7 technology areas.

#19,982
of 49,997 US assignees by volume: 16th percentile
by Innovation Score (25.0/100): 6.8
avg claims per patent: +1000%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R19982 · Foreign Corporation #19,982 · 14 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-MICRO 14 grants
MID-PACK #19,982/49,997
PHOTO-FINISH Kettenbach & KG
CPC-NARROW B23B · 7 areas
INNOV-THIN 25.0/100
CLAIMS-SPARSE 6.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +1000% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Kettenbach GMBH & Co. KG (±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 Kitagawa’s 25.0 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 9.4 pts (37%) Velocity 2.2 pts (9%) Breadth 9.4 pts (37%) Claim depth 4.1 pts (16%)

Qualcomm Incorporated · highest

85
Kitagawa Ironworks · this assignee

25
3D Lighting… · lowest

7

What this shows Kitagawa's Innovation Score is 25.0/100 (16th 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 Kitagawa?

Each dot is one of Kitagawa’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). Kitagawa’s own 6.8 claims/patent is at or below the 9.8 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Kitagawa's grants concentrate

Kitagawa Ironworks Co., Ltd. is a focused PatentsView assignee: 7 CPC subclasses with 85.7% of grants classified under B23B (TURNING; Boring). Peak complete grant year is 2020 (4 grants) versus a trough of 1 in 2019. By volume, Kitagawa sits between Kettenbach GMBH & Co. KG and Korean AIR Lines Co., Ltd.

Kitagawa's three-year grant acceleration

Kitagawa Ironworks Co., Ltd. shows 3 grants in 2022–2024 against only 9 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.

Kettenbach & KG

14
Keuro Besitz & ED…

14
Keyang Electric M…

14
Kingston Technolo…

14
Kiverdi

14
Kobelco Cranes

14
Kogakuin Universi…

14
Korean AIR Lines

14
Kitagawa Ironworks ◀

14

What this shows Kitagawa holds 14 patents at rank #19,971, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Kitagawa

By rank, the assignees closest to #19,971 in granted patent volume.

Leaders in B23B (Turning)

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

Kitagawa's Innovation Score vs. every tracked assignee

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

25 16th percentile higher than 16% 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 · 2019–2025

Grants by year

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

View data table

Kitagawa Ironworks Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2019	1	7.1%
2020	4	28.6%
2021	4	28.6%
2022	2	14.3%
2023	1	7.1%
2025partial year	2	14.3%

Which technologies does Kitagawa Ironworks Co., Ltd. patent most?

B23B - TURNING; Boring 12

Y10T - Technical Subjects Covered BY Former US Classification 8

B23Q - Details, Components, OR Accessories FOR Machine Tools, e.g. Arrangements FOR Copying OR Controlling ; Machine Tools IN General Characterised BY THE Construction OF Particular Details OR COMPONENTS; Combinations OR Associations OF Metal-working Machines, NOT Directed TO A Particular Result 3

B25B - Tools OR Bench Devices NOT Otherwise Provided FOR, FOR Fastening, Connecting, Disengaging OR Holding 2

B25J - MANIPULATORS; Chambers Provided With Manipulation Devices 2

B23C - Milling 1

B24B - Machines, Devices, OR Processes FOR Grinding OR Polishing ; Dressing OR Conditioning OF Abrading SURFACES; Feeding OF Grinding, Polishing, OR Lapping Agents 1

Top 7 of 7 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

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

Kitagawa Ironworks Co., Ltd.'s lead technology class is B23B (TURNING; Boring), 85.7% of its portfolio - see every assignee active in that class. Explore B23B
Ranked #19,982 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Kitagawa Ironworks Co., Ltd. against Kettenbach GMBH & Co. KG, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 25.0/100 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.