Where does Ningbo Singfun Electric Appliance Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Ningbo Singfun Electric Appliance Co., Ltd. ranks #49,119 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 Ningbo Singfun Electric Appliance Co., Ltd. hold?

Ningbo Singfun Electric Appliance Co., Ltd. holds 5 US utility patents granted between 2019 and 2025, spanning 7 technology areas.

What is Ningbo Singfun Electric Appliance Co., Ltd.'s Innovation Score?

Ningbo Singfun Electric Appliance Co., Ltd. has an Innovation Score of 26.0 out of 100 (19th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Ningbo Singfun Electric Appliance Co., Ltd.'s patent grant rate increasing or decreasing?

Ningbo Singfun Electric Appliance Co., Ltd.'s recent grant velocity is +100% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Ningbo Singfun Electric Appliance Co., Ltd.'s patents?

Ningbo Singfun Electric Appliance Co., Ltd.'s patents average 11.8 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 Ningbo Singfun Electric Appliance 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

Ningbo Singfun Electric Appliance Co., Ltd.

Q: What technology areas does Ningbo Singfun Electric Appliance Co., Ltd. focus on?

Ningbo Singfun Electric Appliance Co., Ltd.'s top technology area is F24D (Domestic- OR Space-heating Systems, e.g. Central Heating SYSTEMS; Domestic Hot-water Supply SYSTEMS; Elements OR Components Therefor) with 2 patents, ranking #85 of 228 assignees active in that subclass. Grants appear in 7 CPC subclasses total.

USPTO PatentsView assignee record - 5 granted patents across 7 technology areas, recorded in grant years 2019–2025. 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: F24D (Domestic- OR Space-heating Systems, e.g. Central Heating SYSTEMS; Domestic Hot-water Supply SYSTEMS; Elements OR Components Therefor).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Ningbo ranks #49,119 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 7 technology areas.

#49,119
of 49,997 US assignees by volume: 19th percentile
by Innovation Score (26.0/100): 11.8
avg claims per patent: +100%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R49119 · Foreign Corporation #49,119 · 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 #49,119/49,997
PHOTO-FINISH Ningbo Jieshu…
CPC-NARROW F24D · 7 areas
INNOV-THIN 26.0/100
CLAIMS-PAR 11.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +100% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Ningbo Jieshu Window Coverings Manufacturing 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 Ningbo’s 26.0 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 (24%) Velocity 3.3 pts (13%) Breadth 9.4 pts (36%) Claim depth 7.1 pts (27%)

Qualcomm Incorporated · highest

85
Ningbo Singfun… · this assignee

26
3D Lighting… · lowest

7

What this shows Ningbo's Innovation Score is 26.0/100 (19th 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 Ningbo?

Each dot is one of Ningbo’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). Ningbo’s own 11.8 claims/patent is ABOVE the 1.0 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Ningbo's grants concentrate

Ningbo Singfun Electric Appliance Co., Ltd. is a focused PatentsView assignee: 7 CPC subclasses with 40% of grants classified under F24D (Domestic- OR Space-heating Systems, e.g. Central Heating SYSTEMS; Domestic Hot-water Supply SYSTEMS; Elements OR Components Therefor). By volume, Ningbo sits between Ningbo Jieshu Window Coverings Manufacturing Co. Ltd. and Nintendo of America Inc..

Ningbo's three-year grant acceleration

Ningbo Singfun Electric Appliance Co., Ltd. shows 1 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.

Ningbo Jieshu Win…

5
Ningbo Langyan Te…

5
Ningbo Messi Ligh…

5
Ningbo Qtop Impor…

5
Ningbo Winbay Tec…

5
Ningbo Yongyi Ele…

5
Ninghai Jiarun Ha…

5
Nintendo of Ameri…

5
Ningbo Singfun El… ◀

5

What this shows Ningbo holds 5 patents at rank #49,193, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Ningbo

By rank, the assignees closest to #49,193 in granted patent volume.

Leaders in F24D (Domestic- OR Space-heating Systems)

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

Ningbo's Innovation Score vs. every tracked assignee

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

26 19th percentile higher than 19% 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 · 2019–2025

Grants by year

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

View data table

Ningbo Singfun Electric Appliance Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2019	1	20.0%
2021	1	20.0%
2024	1	20.0%
2025partial year	2	40.0%

Which technologies does Ningbo Singfun Electric Appliance Co., Ltd. patent most?

F24D - Domestic- OR Space-heating Systems, e.g. Central Heating SYSTEMS; Domestic Hot-water Supply SYSTEMS; Elements OR Components Therefor 2

F21S - Non-portable Lighting DEVICES; Systems THEREOF; Vehicle Lighting Devices Specially Adapted FOR Vehicle Exteriors 1

F24C - Domestic Stoves OR Ranges ; Details OF Domestic Stoves OR Ranges, OF General Application 1

F21V - Functional Features OR Details OF Lighting Devices OR Systems THEREOF; Structural Combinations OF Lighting Devices With Other Articles, NOT Otherwise Provided FOR 1

F28D - Heat-exchange Apparatus, NOT Provided FOR IN Another Subclass, IN Which THE Heat-exchange Media DO NOT Come Into Direct Contact 1

F24H - Fluid Heaters, e.g. Water OR AIR Heaters, Having Heat-generating Means, e.g. Heat Pumps, IN General 1

F28F - Details OF Heat-exchange AND Heat-transfer Apparatus, OF General Application 1

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

Ningbo Singfun Electric Appliance Co., Ltd.'s patent record in context - here's where to go next.

Ningbo Singfun Electric Appliance Co., Ltd.'s lead technology class is F24D (Domestic- OR Space-heating Systems, e.g. Central Heating SYSTEMS; Domestic Hot-water Supply SYSTEMS; Elements OR Components Therefor), 40% of its portfolio - see every assignee active in that class. Explore F24D
Ranked #49,119 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Ningbo Singfun Electric Appliance Co., Ltd. against Ningbo Jieshu Window Coverings Manufacturing Co. Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 26.0/100 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.