PlainPatent

CPC technology class · G08

G08B - Signalling OR Calling Systems

Signalling or calling systems; order telegraphs; alarm systems. 25,403 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

25,403
US patents granted
G08
Parent CPC class
20
Active assignees
+28%
5-yr velocity

The verdict

Signalling OR Calling Systems ranks #79 of 670 CPC technology areas - 25,403 US patents granted since 2015, with filing up 28% over five years.

#79
of 670 CPC technology areas
25,403
US patents granted, 2015–2025
Google
leading assignee (654)
+28%
filing velocity, last 5 yrs
Top assignee: Google Llc (654 patents)

CPC subclass G08B - SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS - covers 25,403 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class G08 (SIGNALLING). See our CPC classification guide for how the system works.

The competitive landscape in G08B is shaped by 20 distinct companies actively filing in this space. Google Llc leads with 654 patents, followed by Honeywell International Inc. at 590 grants and Alarm.com Incorporated at 401.

Filing activity in G08B is up 28% over the past five years versus 2015-2019, a sharp acceleration suggesting an emerging or fast-moving technology area. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is G08B innovation accelerating?

US utility-patent grants per year in G08B, 2015–2025 - recent five years are up 28% versus 2015–2019.

1,0001,5002,0002,5003,0003,500 20152016201720182019202020212022202320242025 1,567

Who leads G08B?

The 12 most active assignees in SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS - wider bars mean more grants

patents

What this shows Google is the most active filer in G08B, holding 654 of the 25,403 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 G08B
Rank Company Patents in G08B
#1 Google Llc 654
#2 Honeywell International Inc. 590
#3 Alarm.com Incorporated 401
#4 State Farm Mutual Automobile Insurance Company 388
#5 NEC Corporation 322
#6 Amazon Technologies, Inc. 284
#7 Immersion, Llc 266
#8 TYCO FIRE & Security Gmbh 261
#9 Carrier Corporation 234
#10 Sensormatic Electronics, Llc 216
#11 Vivint Llc 166
#12 Invue Security Products Inc. 164
#13 Motorola Solutions, Inc. 149
#14 AT&T Intellectual Property I, L.p. 146
#15 Icontrol Networks, Inc. 118
#16 Hill-rom Services, Inc. 106
#17 Comcast Cable Communications, Llc 98
#18 Tile, Inc. 95
#19 Axis AB 89
#20 United Services Automobile Association (usaa) 87

About This Class

CPC subclass G08B belongs to class G08.

25,403 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 G08B 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 G08B assignees by class footprint. Bubble size = patents in G08B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 G08B assignees by class footprint. Bubble size = patents in G08B. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 1015202530 0200400600800 Patents in G08B Avg claims / patent (company-wide) GoogleHoneywell Internation…Alarm com IncorporatedState Farm Mutual Aut…NecAmazonImmersionTyco Fire & SecurityCarrierSensormaticVivintInvue Security Produc…Motorola SolutionsAt&T Intellectual Pro…
Top 14 G08B assignees by class footprint. Bubble size = patents in G08B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class G08B?
CPC subclass G08B covers SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS. It belongs to CPC class G08 (SIGNALLING), with 25,403 US utility patents granted since 2015.
How many patents have been filed in G08B?
25,403 US utility patents were granted in CPC subclass G08B between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in G08B?
Google Llc leads G08B with 654 patents, making it the most active assignee in this technology area.
How is patent data for G08B 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., G08) is a broad technology category. Subclasses like G08B 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.