Where does Darfon Electronics (SUZHOU) Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Darfon Electronics (SUZHOU) Co., Ltd. ranks #8,007 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 Darfon Electronics (SUZHOU) Co., Ltd. hold?

Darfon Electronics (SUZHOU) Co., Ltd. holds 40 US utility patents granted between 2015 and 2024, spanning 18 technology areas.

What is Darfon Electronics (SUZHOU) Co., Ltd.'s Innovation Score?

Darfon Electronics (SUZHOU) Co., Ltd. has an Innovation Score of 42.1 out of 100 (top 31% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Darfon Electronics (SUZHOU) Co., Ltd. focus on?

Darfon Electronics (SUZHOU) Co., Ltd.'s top technology area is H01H (Electric SWITCHES; RELAYS; SELECTORS; Emergency Protective Devices) with 27 patents, ranking #50 of 1,006 assignees active in that subclass. Grants appear in 18 CPC subclasses total.

Is Darfon Electronics (SUZHOU) Co., Ltd.'s patent grant rate increasing or decreasing?

Darfon Electronics (SUZHOU) Co., Ltd.'s recent grant velocity is -92% 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 Darfon Electronics (SUZHOU) Co., Ltd.'s patents?

Darfon Electronics (SUZHOU) Co., Ltd.'s patents average 18.3 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 Darfon Electronics (SUZHOU) 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

Darfon Electronics (SUZHOU) Co., Ltd.

USPTO PatentsView assignee record - 40 granted patents across 18 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: H01H (Electric SWITCHES; RELAYS; SELECTORS; Emergency Protective Devices).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Darfon ranks #8,007 of 49,997 tracked US assignees by granted-patent volume, with 40 patents across 18 technology areas.

#8,007
of 49,997 US assignees by volume: Top 31%
by Innovation Score (42.1/100): 18.3
avg claims per patent: -92%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R8007 · Foreign Corporation #8,007 · 40 grants

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

GRANTS-SMALL 40 grants
UPPER-Q #8,007/49,997
PHOTO-FINISH Corbion Biotech
CPC-FOCUS H01H · 18 areas
INNOV-PAR 42.1/100
CLAIMS-RICH 18.3 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -92% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Corbion Biotech, Inc. (±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 Darfon’s 42.1 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 12.8 pts (30%) Velocity 3.3 pts (8%) Breadth 15.0 pts (36%) Claim depth 11.0 pts (26%)

Qualcomm Incorporated · highest

85
Alegeus · near

42
RES USA · near

42
Darfon (SUZHOU) · this assignee

42
Eberhard Karls… · near

42
Universitetet I Oslo · near

42
3D Lighting… · lowest

7

What this shows Darfon's Innovation Score is 42.1/100 (top 31% 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 Darfon?

Each dot is one of Darfon’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). Darfon’s own 18.3 claims/patent is ABOVE the 15.9 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Darfon's grants concentrate

Darfon Electronics (SUZHOU) Co., Ltd. is a focused PatentsView assignee: 18 CPC subclasses with 67.5% of grants classified under H01H (Electric SWITCHES; RELAYS; SELECTORS; Emergency Protective Devices). Peak complete grant year is 2015 (11 grants) versus a trough of 1 in 2021. By volume, Darfon sits between Corbion Biotech, Inc. and Defond Electech Co., Ltd..

Darfon's three-year grant acceleration

Darfon Electronics (SUZHOU) Co., Ltd. shows 2 grants in 2022–2024 against only 4 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.

Corbion Biotech

40
Coriant Operations

40
Credence Medsyste…

40
Danfoss Power Sol…

40
De' Longhi Applia…

40
Doyo Engineering

40
DSG Technology Ho…

40
Defond Electech

40
Darfon (Suzhou) ◀

40

What this shows Darfon holds 40 patents at rank #8,007, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Darfon

By rank, the assignees closest to #8,007 in granted patent volume.

Leaders in H01H (Electric Switches)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Darfon, neither rank-band nor same-CPC leaders (those blocks stay above). In H01H (Electric Switches), Darfon ranks #50 of 1,006 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (42 here).

Eberhard Karls Universität Tübingen 42 Universitetet I Oslo 42 RES USA, LLC 42 Alegeus Technologies, LLC 42

Darfon's Innovation Score vs. every tracked assignee

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

42 Top 31% higher than 69% 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

Darfon Electronics (SUZHOU) Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	11	27.5%
2016	11	27.5%
2017	3	7.5%
2018	9	22.5%
2019	3	7.5%
2021	1	2.5%
2022	1	2.5%
2024	1	2.5%

Which technologies does Darfon Electronics (SUZHOU) Co., Ltd. patent most?

H01H - Electric SWITCHES; RELAYS; SELECTORS; Emergency Protective Devices 27

G06F - Electric Digital Data Processing 10

G02B - Optical Elements, Systems OR Apparatus 6

B62M - Rider Propulsion OF Wheeled Vehicles OR SLEDGES; Powered Propulsion OF Sledges OR ; SINGLE-TRACK; CYCLES; Transmissions Specially Adapted FOR Such Vehicles 5

B62K - CYCLES; Cycle FRAMES; Cycle Steering DEVICES; Rider-operated Terminal Controls Specially Adapted FOR CYCLES; Cycle Axle SUSPENSIONS; Cycle Side-cars, Forecars, OR THE Like 4

H05K - Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components 3

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 3

Y02T - Climate Change Mitigation Technologies Related TO Transportation 3

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 3

B60L - Propulsion OF Electrically-propelled Vehicles ; Supplying Electric Power FOR Auxiliary Equipment OF Electrically-propelled Vehicles ; Electrodynamic Brake Systems FOR Vehicles IN General ; Magnetic Suspension OR Levitation FOR VEHICLES; Monitoring Operating Variables OF Electrically-propelled Vehicl 3

H03K - Pulse Technique 3

B62J - Cycle Saddles OR SEATS; Auxiliary Devices OR Accessories Specially Adapted TO Cycles AND NOT Otherwise Provided FOR, e.g. Article Carriers OR Cycle Protectors 2

H03M - CODING; DECODING; Code Conversion IN General 2

Y10T - Technical Subjects Covered BY Former US Classification 1

H02M - Apparatus FOR Conversion Between AC AND AC, Between AC AND DC, OR Between DC AND DC, AND FOR USE With Mains OR Similar Power Supply SYSTEMS; Conversion OF DC OR AC Input Power Into Surge Output POWER; Control OR Regulation Thereof 1

Top 15 of 18 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

Darfon Electronics (SUZHOU) Co., Ltd.'s patent record in context - here's where to go next.

Darfon Electronics (SUZHOU) Co., Ltd.'s lead technology class is H01H (Electric SWITCHES; RELAYS; SELECTORS; Emergency Protective Devices), 67.5% of its portfolio - see every assignee active in that class. Explore H01H
Ranked #8,007 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Darfon Electronics (SUZHOU) Co., Ltd. against Corbion Biotech, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 42.1/100 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.