Where does Dong-a Flexible Metal Tubes Co., Ltd rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Dong-a Flexible Metal Tubes Co., Ltd ranks #46,218 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 Dong-a Flexible Metal Tubes Co., Ltd hold?

Dong-a Flexible Metal Tubes Co., Ltd holds 5 US utility patents granted between 2016 and 2023, spanning 2 technology areas.

What is Dong-a Flexible Metal Tubes Co., Ltd's Innovation Score?

Dong-a Flexible Metal Tubes Co., Ltd has an Innovation Score of 38.0 out of 100 (top 42% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Dong-a Flexible Metal Tubes Co., Ltd's patent grant rate increasing or decreasing?

Dong-a Flexible Metal Tubes Co., Ltd's recent grant velocity is +50% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Dong-a Flexible Metal Tubes Co., Ltd's patents?

Dong-a Flexible Metal Tubes Co., Ltd's patents average 11.4 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 Dong-a Flexible Metal Tubes 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

Dong-a Flexible Metal Tubes Co., Ltd

Q: What technology areas does Dong-a Flexible Metal Tubes Co., Ltd focus on?

Dong-a Flexible Metal Tubes Co., Ltd's top technology area is F16L (PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General) with 4 patents, ranking #521 of 1,907 assignees active in that subclass. Grants appear in 2 CPC subclasses total.

USPTO PatentsView assignee record - 5 granted patents across 2 technology areas, recorded in grant years 2016–2023. 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: F16L (PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Dong-a ranks #46,218 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 2 technology areas.

#46,218
of 49,997 US assignees by volume: Top 42%
by Innovation Score (38.0/100): 11.4
avg claims per patent: +50%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R46218 · Foreign Corporation #46,218 · 5 grants

GRANTS-MICRO · BOTTOM-DECILE · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-PAR · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-MICRO 5 grants
BOTTOM-DECILE #46,218/49,997
PHOTO-FINISH Dolphin
CPC-NARROW F16L · 2 areas
INNOV-THIN 38.0/100
CLAIMS-PAR 11.4 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +50% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Dolphin 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 Dong-a’s 38.0 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 6.2 pts (16%) Velocity 20.0 pts (53%) Breadth 5.0 pts (13%) Claim depth 6.8 pts (18%)

Qualcomm Incorporated · highest

85
Dong-a Flexible… · this assignee

38
3D Lighting… · lowest

7

What this shows Dong-a's Innovation Score is 38.0/100 (top 42% 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 Dong-a?

Each dot is one of Dong-a’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). Dong-a’s own 11.4 claims/patent is at or below the 12.6 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Dong-a's grants concentrate

Dong-a Flexible Metal Tubes Co., Ltd is a focused PatentsView assignee: 2 CPC subclasses with 80% of grants classified under F16L (PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General). Peak complete grant year is 2023 (2 grants) versus a trough of 1 in 2016. By volume, Dong-a sits between Dolphin Co., Ltd. and Dongguan City Minleon Electronics Co., Ltd..

Dong-a's three-year grant acceleration

Dong-a Flexible Metal Tubes Co., Ltd shows 3 grants in 2022–2024 against only 0 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.

Dolphin

5
Dominant Opto SDN…

5
Donesta Bioscienc…

5
Dong Yang INK

5
Dong-a Teaching M…

5
Dongfang Electric

5
Dongguan Boyi Fur…

5
Dongguan City Min…

5
Dong-a Flexible M… ◀

5

What this shows Dong-a holds 5 patents at rank #46,120, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Dong-a

By rank, the assignees closest to #46,120 in granted patent volume.

Leaders in F16L (Pipes)

Other assignees with the most granted patents in Dong-a's primary technology class.

Dong-a's Innovation Score vs. every tracked assignee

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

38 Top 42% higher than 58% 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 · 2016–2023

Grants by year

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

View data table

Dong-a Flexible Metal Tubes Co., Ltd patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	1	20.0%
2017	1	20.0%
2022	1	20.0%
2023	2	40.0%

Which technologies does Dong-a Flexible Metal Tubes Co., Ltd patent most?

F16L - PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General 4

B21D - Working OR Processing OF Sheet Metal OR Metal Tubes, Rods OR Profiles Without Essentially Removing MATERIAL; Punching Metal 1

Top 2 of 2 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

Dong-a Flexible Metal Tubes Co., Ltd's patent record in context - here's where to go next.

Dong-a Flexible Metal Tubes Co., Ltd's lead technology class is F16L (PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General), 80% of its portfolio - see every assignee active in that class. Explore F16L
Ranked #46,218 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Dong-a Flexible Metal Tubes Co., Ltd against Dolphin Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 38.0/100 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.