Where does Zhejiang Dunan Artificial Environment Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Zhejiang Dunan Artificial Environment Co., Ltd. ranks #8,519 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 Zhejiang Dunan Artificial Environment Co., Ltd. hold?

Zhejiang Dunan Artificial Environment Co., Ltd. holds 38 US utility patents granted between 2017 and 2025, spanning 19 technology areas.

What is Zhejiang Dunan Artificial Environment Co., Ltd.'s Innovation Score?

Zhejiang Dunan Artificial Environment Co., Ltd. has an Innovation Score of 57.1 out of 100 (top 5% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Zhejiang Dunan Artificial Environment Co., Ltd. focus on?

Zhejiang Dunan Artificial Environment Co., Ltd.'s top technology area is F16K (VALVES; TAPS; COCKS; ACTUATING-FLOATS; Devices FOR Venting OR Aerating) with 23 patents, ranking #80 of 1,836 assignees active in that subclass. Grants appear in 19 CPC subclasses total.

Is Zhejiang Dunan Artificial Environment Co., Ltd.'s patent grant rate increasing or decreasing?

Zhejiang Dunan Artificial Environment Co., Ltd.'s recent grant velocity is +1050% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Zhejiang Dunan Artificial Environment Co., Ltd.'s patents?

Zhejiang Dunan Artificial Environment Co., Ltd.'s patents average 15.1 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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Zhejiang Dunan Artificial Environment Co., Ltd.

Q: How is the Zhejiang Dunan Artificial Environment 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 PatentsView assignee record - 38 granted patents across 19 technology areas, recorded in grant years 2017–2025. 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: F16K (VALVES; TAPS; COCKS; ACTUATING-FLOATS; Devices FOR Venting OR Aerating).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Zhejiang ranks #8,519 of 49,997 tracked US assignees by granted-patent volume, with 38 patents across 19 technology areas.

#8,519
of 49,997 US assignees by volume: Top 5%
by Innovation Score (57.1/100): 15.1
avg claims per patent: +1050%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R8519 · Foreign Corporation #8,519 · 38 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-RICH · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-SMALL 38 grants
UPPER-Q #8,519/49,997
PHOTO-FINISH Wm T Burnett IP
CPC-FOCUS F16K · 19 areas
INNOV-PAR 57.1/100
CLAIMS-RICH 15.1 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +1050% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Wm. T. Burnett IP, LLC (±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 Zhejiang’s 57.1 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 12.7 pts (22%) Velocity 20.0 pts (35%) Breadth 15.4 pts (27%) Claim depth 9.0 pts (16%)

Qualcomm Incorporated · highest

85
AIR Cruisers · near

57
Blue-White Industries · near

57
D-wave Systems · near

57
Zhejiang Dunan… · this assignee

57
Zhuhai Pantum · near

57
3D Lighting… · lowest

7

What this shows Zhejiang's Innovation Score is 57.1/100 (top 5% 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 Zhejiang?

Each dot is one of Zhejiang’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). Zhejiang’s own 15.1 claims/patent is at or below the 16.3 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Zhejiang's grants concentrate

Zhejiang Dunan Artificial Environment Co., Ltd. is a focused PatentsView assignee: 19 CPC subclasses with 60.5% of grants classified under F16K (VALVES; TAPS; COCKS; ACTUATING-FLOATS; Devices FOR Venting OR Aerating). Peak complete grant year is 2024 (17 grants) versus a trough of 1 in 2017. By volume, Zhejiang sits between Wm. T. Burnett IP, LLC and ABT, Inc..

Zhejiang's three-year grant acceleration

Zhejiang Dunan Artificial Environment Co., Ltd. shows 23 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.

Wm T Burnett IP

38
Xevo

38
Yext

38
Yieldmo

38
Ziemer Ophthalmic…

38
Zhejiang Dunan Ar… ◀

38
7rdd

37
ABS Global

37
ABT

37

What this shows Zhejiang holds 38 patents at rank #8,519, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Zhejiang

By rank, the assignees closest to #8,519 in granted patent volume.

Leaders in F16K (Valves)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Zhejiang, neither rank-band nor same-CPC leaders (those blocks stay above). In F16K (Valves), Zhejiang ranks #80 of 1,836 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (57 here).

Blue-White Industries, Ltd. 57 Zhuhai Pantum Electronics Co., Ltd. 57 D-wave Systems Inc. 57 AIR Cruisers Company, LLC 57

Zhejiang's Innovation Score vs. every tracked assignee

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

57 Top 5% higher than 95% 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 · 2017–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2017–2019 baseline. Full figures in the table below.

View data table

Zhejiang Dunan Artificial Environment Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2017	1	2.6%
2018	1	2.6%
2022	2	5.3%
2023	4	10.5%
2024	17	44.7%
2025partial year	13	34.2%

Which technologies does Zhejiang Dunan Artificial Environment Co., Ltd. patent most?

F16K - VALVES; TAPS; COCKS; ACTUATING-FLOATS; Devices FOR Venting OR Aerating 23

F25B - Refrigeration Machines, Plants OR SYSTEMS; Combined Heating AND Refrigeration SYSTEMS; Heat Pump Systems 21

F28F - Details OF Heat-exchange AND Heat-transfer Apparatus, OF General Application 12

F28D - Heat-exchange Apparatus, NOT Provided FOR IN Another Subclass, IN Which THE Heat-exchange Media DO NOT Come Into Direct Contact 11

Y02B - Climate Change Mitigation Technologies Related TO Buildings, e.g. Housing, House Appliances OR Related End-user Applications 10

F24F - AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR Currents FOR Screening 4

H01F - MAGNETS; INDUCTANCES; TRANSFORMERS; Selection OF Materials FOR Their Magnetic Properties 3

B60H - Arrangements OF Heating, Cooling, Ventilating OR Other Air-treating Devices Specially Adapted FOR Passenger OR Goods Spaces OF Vehicles 2

H02K - Dynamo-electric Machines 2

Y10T - Technical Subjects Covered BY Former US Classification 2

F05D - Indexing Scheme FOR Aspects Relating TO Non-positive-displacement Machines OR Engines, Gas-turbines OR Jet-propulsion Plants 1

F04D - Non-positive-displacement Pumps 1

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

B23K - Soldering OR UNSOLDERING; WELDING; Cladding OR Plating BY Soldering OR WELDING; Cutting BY Applying Heat Locally, e.g. Flame CUTTING; Working BY Laser Beam 1

G01L - Measuring Force, Stress, Torque, Work, Mechanical Power, Mechanical Efficiency, OR Fluid Pressure 1

Top 15 of 19 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

Zhejiang Dunan Artificial Environment Co., Ltd.'s patent record in context - here's where to go next.

Zhejiang Dunan Artificial Environment Co., Ltd.'s lead technology class is F16K (VALVES; TAPS; COCKS; ACTUATING-FLOATS; Devices FOR Venting OR Aerating), 60.5% of its portfolio - see every assignee active in that class. Explore F16K
Ranked #8,519 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Zhejiang Dunan Artificial Environment Co., Ltd. against Wm. T. Burnett IP, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 57.1/100 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.