Where does Darfon Electronics Corp. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Darfon Electronics Corp. ranks #1,872 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 Corp. hold?

Darfon Electronics Corp. holds 214 US utility patents granted between 2015 and 2025, spanning 36 technology areas.

What is Darfon Electronics Corp.'s Innovation Score?

Darfon Electronics Corp. has an Innovation Score of 61.4 out of 100 (top 3% 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 Corp. focus on?

Darfon Electronics Corp.'s top technology area is H01H (Electric SWITCHES; RELAYS; SELECTORS; Emergency Protective Devices) with 167 patents, ranking #9 of 1,006 assignees active in that subclass. Grants appear in 36 CPC subclasses total.

Is Darfon Electronics Corp.'s patent grant rate increasing or decreasing?

Darfon Electronics Corp.'s recent grant velocity is +51% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Darfon Electronics Corp.'s patents?

Darfon Electronics Corp.'s patents average 17.3 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 Corp. 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 Corp.

USPTO PatentsView assignee record - 214 granted patents across 36 technology areas, recorded in grant years 2015–2025. 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: 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 #1,872 of 49,997 tracked US assignees by granted-patent volume, with 214 patents across 36 technology areas.

#1,872
of 49,997 US assignees by volume: Top 3%
by Innovation Score (61.4/100): 17.3
avg claims per patent: +51%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R1872 · Foreign Corporation #1,872 · 214 grants

GRANTS-MID · TOP-DECILE · PHOTO-FINISH · CPC-FOCUS · INNOV-STRONG · CLAIMS-RICH · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-MID 214 grants
TOP-DECILE #1,872/49,997
PHOTO-FINISH AWI Licensing
CPC-FOCUS H01H · 36 areas
INNOV-STRONG 61.4/100
CLAIMS-RICH 17.3 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +51% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: AWI Licensing 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 Darfon’s 61.4 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 18.6 pts (30%) Velocity 11.2 pts (18%) Breadth 21.2 pts (35%) Claim depth 10.4 pts (17%)

Qualcomm Incorporated · highest

85
Furukawa Electric · near

61
Hydro-Quebec · near

61
Darfon · this assignee

61
University of… · near

61
Evoqua Water · near

61
3D Lighting… · lowest

7

What this shows Darfon's Innovation Score is 61.4/100 (top 3% 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 17.3 claims/patent is ABOVE the 16.4 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 Corp. is a focused PatentsView assignee: 36 CPC subclasses with 78% of grants classified under H01H (Electric SWITCHES; RELAYS; SELECTORS; Emergency Protective Devices). Peak complete grant year is 2024 (30 grants) versus a trough of 9 in 2017. By volume, Darfon sits between Ticona LLC and Johnson Electric International AG.

Darfon's three-year grant acceleration

From 2019–2021 to 2022–2024, Darfon Electronics Corp. moved from 47 to 79 grants (1.68x the prior three-year total, a multiple, not a CAGR). Among 3,296 tracked assignees with ≥100 grants and ≥20 prior-period grants, that multiple ranks #321. See the growth leaderboard.

Ticona

215
Westerngeco L L C

215
Zoetis Services

215
AWI Licensing

214
F5 Networks

214
Glaxosmithkline I…

214
Grundfos Holding…

214
Johnson Electric…

214
Darfon ◀

214

What this shows Darfon holds 214 patents at rank #1,872, 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 #1,872 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 #9 of 1,006 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (61 here).

University of Washington through its Center for Commercialization 61 Evoqua Water Technologies LLC 61 Furukawa Electric Co., Ltd. 61 Hydro-Quebec 61

Similar claim depth

Nearest assignees by average claims per patent (17.3 here).

ZF CV Systems Europe BV 17.3 avg ICU Medical, Inc. 17.3 avg WestRock Packaging Systems, LLC 17.3 avg Hunter Industries, Inc. 17.3 avg

Darfon's Innovation Score vs. every tracked assignee

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

61 Top 3% higher than 97% 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 · 2015–2025

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 Corp. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	17	7.9%
2016	16	7.5%
2017	9	4.2%
2018	20	9.3%
2019	13	6.1%
2020	17	7.9%
2021	17	7.9%
2022	22	10.3%
2023	27	12.6%
2024	30	14.0%
2025partial year	26	12.1%

Which technologies does Darfon Electronics Corp. patent most?

H01H - Electric SWITCHES; RELAYS; SELECTORS; Emergency Protective Devices 167

G06F - Electric Digital Data Processing 56

G02B - Optical Elements, Systems OR Apparatus 40

H03K - Pulse Technique 25

B62M - Rider Propulsion OF Wheeled Vehicles OR SLEDGES; Powered Propulsion OF Sledges OR ; SINGLE-TRACK; CYCLES; Transmissions Specially Adapted FOR Such Vehicles 9

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

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 6

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 6

H05K - Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components 5

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 5

Y02B - Climate Change Mitigation Technologies Related TO Buildings, e.g. Housing, House Appliances OR Related End-user Applications 4

Y02T - Climate Change Mitigation Technologies Related TO Transportation 4

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 4

H03M - CODING; DECODING; Code Conversion IN General 4

F21V - Functional Features OR Details OF Lighting Devices OR Systems THEREOF; Structural Combinations OF Lighting Devices With Other Articles, NOT Otherwise Provided FOR 3

Top 15 of 36 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 Corp.'s patent record in context - here's where to go next.

Darfon Electronics Corp.'s lead technology class is H01H (Electric SWITCHES; RELAYS; SELECTORS; Emergency Protective Devices), 78% of its portfolio - see every assignee active in that class. Explore H01H
Ranked #1,872 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Darfon Electronics Corp. against Ticona LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 61.4/100 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.