Where does Chengdu Yefan Science AND Technology Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Chengdu Yefan Science AND Technology Co., Ltd. ranks #31,188 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 Chengdu Yefan Science AND Technology Co., Ltd. hold?

Chengdu Yefan Science AND Technology Co., Ltd. holds 8 US utility patents granted between 2020 and 2021, spanning 7 technology areas.

What is Chengdu Yefan Science AND Technology Co., Ltd.'s Innovation Score?

Chengdu Yefan Science AND Technology Co., Ltd. has an Innovation Score of 23.5 out of 100 (12th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Chengdu Yefan Science AND Technology Co., Ltd.'s patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for Chengdu Yefan Science AND Technology Co., Ltd..

What does claim depth mean for Chengdu Yefan Science AND Technology Co., Ltd.'s patents?

Chengdu Yefan Science AND Technology Co., Ltd.'s patents average 11.0 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

Chengdu Yefan Science AND Technology Co., Ltd.

Q: What technology areas does Chengdu Yefan Science AND Technology Co., Ltd. focus on?

Chengdu Yefan Science AND Technology Co., Ltd.'s top technology area is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution) with 8 patents, ranking #1,506 of 5,963 assignees active in that subclass. Grants appear in 7 CPC subclasses total.

Q: How is the Chengdu Yefan Science AND Technology 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 - 8 granted patents across 7 technology areas, recorded in grant years 2020–2021. 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: Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Chengdu ranks #31,188 of 49,997 tracked US assignees by granted-patent volume, with 8 patents across 7 technology areas.

#31,188
of 49,997 US assignees by volume: 12th percentile
by Innovation Score (23.5/100): 11.0
avg claims per patent

USPTO PatentsView assignee plate

Corpus R31188 · Foreign Corporation #31,188 · 8 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-PAR · TYPE-FRNCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 8 grants
MID-PACK #31,188/49,997
PHOTO-FINISH Channel Investments
CPC-NARROW Y02E · 7 areas
INNOV-THIN 23.5/100
CLAIMS-PAR 11.0 claims/avg
TYPE-FRNCORP Foreign Corp
SPAN-YRS 2020–2021 · 2y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Channel Investments, 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 Chengdu’s 23.5 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 7.6 pts (32%) Velocity 0.0 pts (0%) Breadth 9.4 pts (40%) Claim depth 6.6 pts (28%)

Qualcomm Incorporated · highest

85
Chengdu Yefan… · this assignee

24
3D Lighting… · lowest

7

What this shows Chengdu's Innovation Score is 23.5/100 (12th 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 Chengdu?

Each dot is one of Chengdu’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). Chengdu’s own 11.0 claims/patent is at or below the 12.5 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Chengdu's grants concentrate

Chengdu Yefan Science AND Technology Co., Ltd. is a focused PatentsView assignee: 7 CPC subclasses with 100% of grants classified under Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution). Peak complete grant year is 2021 (6 grants) versus a trough of 2 in 2020. By volume, Chengdu sits between Channel Investments, LLC and China General Nuclear Power Group.

Channel Investmen…

8
Charles Sturt Uni…

8
Checkmarx

8
Chengdu Aircraft…

8
Chilisin

8
China Constructio…

8
China Constructio…

8
China General Nuc…

8
Chengdu Yefan Sci… ◀

8

What this shows Chengdu holds 8 patents at rank #31,151, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Chengdu

By rank, the assignees closest to #31,151 in granted patent volume.

Leaders in Y02E (Reduction OF Greenhouse GAS [GHG] Emissions)

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

Chengdu's Innovation Score vs. every tracked assignee

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

24 12th percentile higher than 12% 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 · 2020–2021

Grants by year

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

View data table

Chengdu Yefan Science AND Technology Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2020	2	25.0%
2021	6	75.0%

Which technologies does Chengdu Yefan Science AND Technology Co., Ltd. patent most?

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 8

H10F - Inorganic Semiconductor Devices Sensitive TO Infrared Radiation, Light, Electromagnetic Radiation OF Shorter Wavelength OR Corpuscular Radiation 8

Y02B - Climate Change Mitigation Technologies Related TO Buildings, e.g. Housing, House Appliances OR Related End-user Applications 5

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 3

H01L - Semiconductor Devices NOT Covered BY Class H10 3

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 3

H02S - Generation OF Electric Power BY Conversion OF Infrared Radiation, Visible Light OR Ultraviolet Light, e.g. Using Photovoltaic [PV] Modules 3

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

Chengdu Yefan Science AND Technology Co., Ltd.'s patent record in context - here's where to go next.

Chengdu Yefan Science AND Technology Co., Ltd.'s lead technology class is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution), 100% of its portfolio - see every assignee active in that class. Explore Y02E
Ranked #31,188 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Chengdu Yefan Science AND Technology Co., Ltd. against Channel Investments, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 23.5/100 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.