Where does DK City Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), DK City Corporation ranks #22,468 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 DK City Corporation hold?

DK City Corporation holds 12 US utility patents granted between 2016 and 2021, spanning 4 technology areas.

What is DK City Corporation's Innovation Score?

DK City Corporation has an Innovation Score of 20.3 out of 100 (7th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is DK City Corporation's patent grant rate increasing or decreasing?

DK City Corporation's recent grant velocity is -67% 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 DK City Corporation's patents?

DK City Corporation's patents average 7.3 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 DK City Corporation 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

DK City Corporation

Q: What technology areas does DK City Corporation focus on?

DK City Corporation's top technology area is A63B (Apparatus FOR Physical Training, Gymnastics, Swimming, Climbing, OR FENCING; Ball GAMES; Training Equipment) with 7 patents, ranking #192 of 1,021 assignees active in that subclass. Grants appear in 4 CPC subclasses total.

USPTO PatentsView assignee record - 12 granted patents across 4 technology areas, recorded in grant years 2016–2021. 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: A63B (Apparatus FOR Physical Training, Gymnastics, Swimming, Climbing, OR FENCING; Ball GAMES; Training Equipment).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, DK ranks #22,468 of 49,997 tracked US assignees by granted-patent volume, with 12 patents across 4 technology areas.

#22,468
of 49,997 US assignees by volume: 7th percentile
by Innovation Score (20.3/100): 7.3
avg claims per patent: -67%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R22468 · Foreign Corporation #22,468 · 12 grants

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

GRANTS-MICRO 12 grants
MID-PACK #22,468/49,997
PHOTO-FINISH Diamond & Zebra…
CPC-NARROW A63B · 4 areas
INNOV-THIN 20.3/100
CLAIMS-SPARSE 7.3 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -67% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Diamond & Zebra Electric MFG. 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 DK’s 20.3 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 8.9 pts (44%) Velocity 0.0 pts (0%) Breadth 7.1 pts (35%) Claim depth 4.4 pts (22%)

Qualcomm Incorporated · highest

85
DK City · this assignee

20
3D Lighting… · lowest

7

What this shows DK's Innovation Score is 20.3/100 (7th 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 DK?

Each dot is one of DK’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). DK’s own 7.3 claims/patent is at or below the 13.4 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where DK's grants concentrate

DK City Corporation is a focused PatentsView assignee: 4 CPC subclasses with 58.3% of grants classified under A63B (Apparatus FOR Physical Training, Gymnastics, Swimming, Climbing, OR FENCING; Ball GAMES; Training Equipment). Peak complete grant year is 2016 (3 grants) versus a trough of 1 in 2018. By volume, DK sits between Diamond & Zebra Electric MFG. Co., Ltd. and Douglas Scientific, LLC.

Diamond & Zebra E…

12
Digital River

12
Diode Dynamics L…

12
Disa Industries A…

12
Dongguan Saienchu…

12
Doosan Babcock

12
Dormakaba Canada

12
Douglas Scientific

12
DK City ◀

12

What this shows DK holds 12 patents at rank #22,451, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near DK

By rank, the assignees closest to #22,451 in granted patent volume.

Leaders in A63B (Apparatus FOR Physical Training)

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

DK's Innovation Score vs. every tracked assignee

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

20 7th percentile higher than 7% 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 · 2016–2021

Grants by year

Teal-shaded recent years (2020–present) versus the 2016–2019 baseline. Full figures in the table below.

View data table

DK City Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	3	25.0%
2017	2	16.7%
2018	1	8.3%
2019	3	25.0%
2020	2	16.7%
2021	1	8.3%

Which technologies does DK City Corporation patent most?

A63B - Apparatus FOR Physical Training, Gymnastics, Swimming, Climbing, OR FENCING; Ball GAMES; Training Equipment 7

A61G - Transport, Personal Conveyances, OR Accommodation Specially Adapted FOR Patients OR Disabled Persons ; Operating Tables OR CHAIRS; Chairs FOR DENTISTRY; Funeral Devices 5

A47C - CHAIRS; SOFAS; Beds 3

F16B - Devices FOR Fastening OR Securing Constructional Elements OR Machine Parts Together, e.g. Nails, Bolts, Circlips, Clamps, Clips OR WEDGES; Joints OR Jointing 1

Top 4 of 4 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

DK City Corporation's patent record in context - here's where to go next.

DK City Corporation's lead technology class is A63B (Apparatus FOR Physical Training, Gymnastics, Swimming, Climbing, OR FENCING; Ball GAMES; Training Equipment), 58.3% of its portfolio - see every assignee active in that class. Explore A63B
Ranked #22,468 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare DK City Corporation against Diamond & Zebra Electric MFG. Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 20.3/100 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.