USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Darfon Electronics Corp.

USPTO PatentsView assignee record - 214 granted patents across 36 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H01H (ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

214

Total patents granted

CPC technology areas

17.3

Avg claims per patent

+85%

5-year filing velocity

The verdict

Darfon holds 214 US patents across 36 technology areas, rank #1,872 of 50,000 tracked assignees.

#1,872
of 50,000 US assignees by volume: Top 3%
by Innovation Score (61.4/100): 17.3
avg claims per patent: +85%
filing velocity, last 5 yrs

Portfolio overview

Darfon Electronics Corp. has been granted 214 US utility patents between 2015 and 2025, placing Darfon Electronics Corp. at rank #1,872 across all assignees tracked by PlainPatent. This portfolio spans 36 distinct Cooperative Patent Classification (CPC) subclasses, averaging 17.3 claims per patent with primary concentration in H01H (ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES). As a Foreign Corporation, Darfon Electronics Corp. is one of the more focused assignees in the PatentsView dataset. By volume, Darfon sits between Ticona Llc (215 patents, rank #1,868) and Johnson Electric International Ag (214 patents, rank #1,876) - the closest US assignees by grant volume. The composite Innovation Score of 61.4/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 139 grants, compared with 75 in the 2015–2019 window, a +85% shift in five-year velocity. An acceleration of this magnitude signals aggressive R&D investment and expanding technical ambition. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. Darfon Electronics Corp.'s 17.3 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while a multi-domain presence across 36 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Darfon Electronics Corp. against peers pursuing similar technology classes.

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.

Darfon's Innovation Score vs. every tracked assignee

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

61 Top 3% higher than 97% of 50,000 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%
2025	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

Patent Moat Analysis

Portfolio Volume Moderate

Tech Breadth Multi-domain

Claim Depth Standard

Velocity Accelerating

Where it ranks

Overall rank by patents

#1,872

Across all tracked assignees

Innovation Score

61.4 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does Darfon Electronics Corp. hold?

Darfon Electronics Corp. holds 214 US granted patents filed 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. This composite metric weighs portfolio volume (40%), filing 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. The company has filed patents in 36 CPC subclasses total.

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

Darfon Electronics Corp.'s recent filing velocity is +85% compared to the prior five-year period. This indicates accelerating innovation.

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

Darfon Electronics Corp.'s patents average 17.3 claims each. This falls within the standard range, providing solid legal coverage.

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.

How to use this portfolio

Darfon's 214 grants land it in the top 3% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - Darfon ranks #1,872 of 50,000. Top 50 holders
Most of this portfolio concentrates in H01H - see who else leads that technology area. H01H leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

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 byPlainPatent Editorial, US Patent Intelligence Editorial Team · 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.