PlainPatent

CPC technology class · F23

F23Q - Ignition

Ignition ; extinguishing-devices. 516 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

516
US patents granted
F23
Parent CPC class
20
Active assignees
-14%
5-yr velocity

The verdict

Ignition ranks #538 of 670 CPC technology areas - 516 US patents granted since 2015, with filing down 14% over five years.

#538
of 670 CPC technology areas
516
US patents granted, 2015–2025
Ngk Spark Plug
leading assignee (35)
-14%
filing velocity, last 5 yrs
Top assignee: NGK Spark PLUG Co., Ltd. (35 patents)

CPC subclass F23Q - IGNITION ; EXTINGUISHING-DEVICES - covers 516 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class F23 (COMBUSTION APPARATUS; COMBUSTION PROCESSES). See our CPC classification guide for how the system works.

The competitive landscape in F23Q is shaped by 20 distinct companies actively filing in this space. NGK Spark PLUG Co., Ltd. leads with 35 patents, followed by Borgwarner Ludwigsburg Gmbh at 16 grants and Societe BIC at 8.

Filing activity in F23Q is down 14% over the past five years versus 2015-2019, a relatively steady filing pace. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is F23Q innovation accelerating?

US utility-patent grants per year in F23Q, 2015–2025 - recent five years are down 14% versus 2015–2019.

10203040506070 20152016201720182019202020212022202320242025 22

Who leads F23Q?

The 12 most active assignees in IGNITION ; EXTINGUISHING-DEVICES - wider bars mean more grants

patents

What this shows Ngk Spark Plug is the most active filer in F23Q, holding 35 of the 516 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

Source USPTO PatentsView, granted utility patents As of 2015–2025 grant years
View data table
Top patent holders in CPC subclass F23Q
Rank Company Patents in F23Q
#1 NGK Spark PLUG Co., Ltd. 35
#2 Borgwarner Ludwigsburg Gmbh 16
#3 Societe BIC 8
#4 Clearsign Combustion Corporation 8
#5 Collins Engine Nozzles, Inc. 6
#6 Pro-iroda Industries, Inc. 6
#7 Bosch Corporation 6
#8 Lamplight Farms Incorporated 6
#9 Ludela Technologies Llc 6
#10 Beyrodts Best Llc 5
#11 Chentronics, Llc 5
#12 Orbital ATK, Inc. 4
#13 Eberspächer Climate Control Systems Gmbh 4
#14 Traeger Pellet Grills, Llc 4
#15 Outdoor EDGE Cutlery, Llc 4
#16 Channel Products, Inc. 4
#17 Clearsign Technologies Corporation 3
#18 Worthington Torch, Llc 3
#19 Zippo Manufacturing Company 3
#20 Procom Heating, Inc. 3

About This Class

CPC subclass F23Q belongs to class F23.

516 patents were granted in this class between 2015 and 2025.

20 companies actively patent in this space.

Classification System

Cooperative Patent Classification (CPC) is a hierarchical patent classification system used by the USPTO and EPO.

← All Technology Classes Technology Rankings →

Footprint here vs. claim strategy

Each dot is a leading F23Q assignee, placed by how many patents it holds in this class (horizontal) against its company-wide average claims per patent (vertical) - a read on whether the class is led by broad-but-shallow filers or focused deep-claim players.

Top 14 F23Q assignees by class footprint. Bubble size = patents in F23Q. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 F23Q assignees by class footprint. Bubble size = patents in F23Q. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 5101520253035 010203040 Patents in F23Q Avg claims / patent (company-wide) Ngk Spark PlugBorgwarner LudwigsburgSociete BicClearsign CombustionCollins Engine NozzlesPro-iroda IndustriesBoschLamplight Farms Incor…LudelaBeyrodts BestChentronicsOrbital AtkEberspÄCher Climate C…Traeger Pellet Grills
Top 14 F23Q assignees by class footprint. Bubble size = patents in F23Q. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class F23Q?
CPC subclass F23Q covers IGNITION ; EXTINGUISHING-DEVICES. It belongs to CPC class F23 (COMBUSTION APPARATUS; COMBUSTION PROCESSES), with 516 US utility patents granted since 2015.
How many patents have been filed in F23Q?
516 US utility patents were granted in CPC subclass F23Q between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in F23Q?
NGK Spark PLUG Co., Ltd. leads F23Q with 35 patents, making it the most active assignee in this technology area.
How is patent data for F23Q collected?
Patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office. It covers all US granted utility patents and assigns CPC codes based on the technology described in each patent.
What is the difference between CPC class and subclass?
A CPC class (e.g., F23) is a broad technology category. Subclasses like F23Q provide finer granularity within that category. PlainPatent organizes data at the subclass level (4-character codes) for the most useful view of technology domains.

Read our methodology - how this data is sourced, computed, and verified.

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

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.