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

According to USPTO PatentsView (2015–2025 granted utility patents), Dongnan Elevator Co., Ltd. ranks #26,145 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 Dongnan Elevator Co., Ltd. hold?

Dongnan Elevator Co., Ltd. holds 10 US utility patents granted between 2015 and 2024, spanning 6 technology areas.

What is Dongnan Elevator Co., Ltd.'s Innovation Score?

Dongnan Elevator Co., Ltd. has an Innovation Score of 26.8 out of 100 (21st 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 Dongnan Elevator Co., Ltd. focus on?

Dongnan Elevator Co., Ltd.'s top technology area is B66B (ELEVATORS; Escalators OR Moving Walkways) with 10 patents, ranking #16 of 127 assignees active in that subclass. Grants appear in 6 CPC subclasses total.

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

Dongnan Elevator Co., Ltd.'s recent grant velocity is -75% 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 Dongnan Elevator Co., Ltd.'s patents?

Dongnan Elevator Co., Ltd.'s patents average 5.3 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 Dongnan Elevator 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

Dongnan Elevator Co., Ltd.

USPTO PatentsView assignee record - 10 granted patents across 6 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: B66B (ELEVATORS; Escalators OR Moving Walkways).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Dongnan ranks #26,145 of 49,997 tracked US assignees by granted-patent volume, with 10 patents across 6 technology areas.

#26,145
of 49,997 US assignees by volume: 21st percentile
by Innovation Score (26.8/100): 5.3
avg claims per patent: -75%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R26145 · Foreign Corporation #26,145 · 10 grants

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

GRANTS-MICRO 10 grants
MID-PACK #26,145/49,997
PHOTO-FINISH Dongguan Bidisco…
CPC-NARROW B66B · 6 areas
INNOV-THIN 26.8/100
CLAIMS-SPARSE 5.3 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -75% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Dongguan Bidisco Electric 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 Dongnan’s 26.8 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 8.3 pts (31%) Velocity 6.7 pts (25%) Breadth 8.7 pts (32%) Claim depth 3.2 pts (12%)

Qualcomm Incorporated · highest

85
Dongnan Elevator · this assignee

27
3D Lighting… · lowest

7

What this shows Dongnan's Innovation Score is 26.8/100 (21st 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 Dongnan?

Each dot is one of Dongnan’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). Dongnan’s own 5.3 claims/patent is ABOVE the 1.9 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Dongnan's grants concentrate

Dongnan Elevator Co., Ltd. is a focused PatentsView assignee: 6 CPC subclasses with 100% of grants classified under B66B (ELEVATORS; Escalators OR Moving Walkways). Peak complete grant year is 2017 (3 grants) versus a trough of 1 in 2015. By volume, Dongnan sits between Dongguan Bidisco Electric Co., Ltd. and Dri-Eaz Products, Inc..

Dongnan's three-year grant acceleration

Dongnan Elevator Co., Ltd. shows 2 grants in 2022–2024 against only 2 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.

Dongguan Bidisco…

10
Dongguan City Kai…

10
Dongguan Empress…

10
Dongguan Kangroad…

10
Dorner Mfg

10
Dose Health

10
Dragontree Beheer…

10
Dri-eaz Products

10
Dongnan Elevator ◀

10

What this shows Dongnan holds 10 patents at rank #26,161, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Dongnan

By rank, the assignees closest to #26,161 in granted patent volume.

Leaders in B66B (Elevators)

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

Dongnan's Innovation Score vs. every tracked assignee

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

27 21st percentile higher than 21% 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

Dongnan Elevator Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	10.0%
2016	2	20.0%
2017	3	30.0%
2019	2	20.0%
2024	2	20.0%

Which technologies does Dongnan Elevator Co., Ltd. patent most?

B66B - ELEVATORS; Escalators OR Moving Walkways 10

Y02B - Climate Change Mitigation Technologies Related TO Buildings, e.g. Housing, House Appliances OR Related End-user Applications 2

E04F - Finishing Work ON Buildings, e.g. Stairs, Floors 1

F15B - Systems Acting BY Means OF Fluids IN GENERAL; Fluid-pressure Actuators, e.g. SERVOMOTORS; Details OF Fluid-pressure Systems, NOT Otherwise Provided FOR 1

E21D - SHAFTS; TUNNELS; GALLERIES; Large Underground Chambers 1

B21F - Working OR Processing OF Metal Wire 1

Top 6 of 6 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

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

Dongnan Elevator Co., Ltd.'s lead technology class is B66B (ELEVATORS; Escalators OR Moving Walkways), 100% of its portfolio - see every assignee active in that class. Explore B66B
Ranked #26,145 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Dongnan Elevator Co., Ltd. against Dongguan Bidisco Electric Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 26.8/100 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.