PlainPatent

CPC technology class · G01

G01K - Measuring Temperature

Measuring temperature; measuring quantity of heat; thermally-sensitive elements not otherwise provided for. 8,803 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

8,803
US patents granted
G01
Parent CPC class
20
Active assignees
+43%
5-yr velocity

The verdict

Measuring Temperature ranks #182 of 670 CPC technology areas - 8,803 US patents granted since 2015, with filing up 43% over five years.

#182
of 670 CPC technology areas
8,803
US patents granted, 2015–2025
Samsung
leading assignee (131)
+43%
filing velocity, last 5 yrs
Top assignee: Samsung Electronics Co., Ltd. (131 patents)

CPC subclass G01K - MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR - covers 8,803 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class G01 (MEASURING; TESTING). See our CPC classification guide for how the system works.

The competitive landscape in G01K is shaped by 20 distinct companies actively filing in this space. Samsung Electronics Co., Ltd. leads with 131 patents, followed by Kidde Technologies, Inc. at 52 grants and Rosemount Inc. at 51.

Filing activity in G01K is up 43% 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 G01K innovation accelerating?

US utility-patent grants per year in G01K, 2015–2025 - recent five years are up 43% versus 2015–2019.

4005006007008009001,000 20152016201720182019202020212022202320242025 600

Who leads G01K?

The 12 most active assignees in MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR - wider bars mean more grants

patents

What this shows Samsung is the most active filer in G01K, holding 131 of the 8,803 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 G01K
Rank Company Patents in G01K
#1 Rosemount Aerospace Inc. 53
#2 Kidde Technologies, Inc. 52
#3 Rosemount Inc. 51
#4 ARC Devices Limited 47
#5 Varcode Ltd. 45
#6 Endress+hauser Wetzer Gmbh+co. KG 41
#7 Watlow Electric Manufacturing Company 40
#8 Gecko Robotics, Inc. 32
#9 Siemens Energy, Inc. 26
#10 Shibaura Electronics Co., Ltd. 25
#11 Temptime Corporation 24
#12 Fluke Corporation 20
#13 Welch Allyn, Inc. 20
#14 Weber-stephen Products Llc 19
#15 Heraeus Electro-nite International N.v. 19
#16 Sitime Corporation 18
#17 Tyco Electronics (shanghai) Co., Ltd. 16
#18 TDK Electronics Ag 16
#19 Masimo Corporation 15
#20 Endress+hauser Flowtec Ag 15

About This Class

CPC subclass G01K belongs to class G01.

8,803 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 G01K 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 G01K assignees by class footprint. Bubble size = patents in G01K. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 G01K assignees by class footprint. Bubble size = patents in G01K. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 51015202530 102030405060 Patents in G01K Avg claims / patent (company-wide) Rosemount AerospaceKiddeRosemountArc DevicesVarcodeEndress+Hauser Wetzer…Watlow Electric Manuf…Gecko RoboticsSiemens EnergyShibauraTemptimeFlukeWelch AllynWeber-stephen Products
Top 14 G01K assignees by class footprint. Bubble size = patents in G01K. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class G01K?
CPC subclass G01K covers MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR. It belongs to CPC class G01 (MEASURING; TESTING), with 8,803 US utility patents granted since 2015.
How many patents have been filed in G01K?
8,803 US utility patents were granted in CPC subclass G01K between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in G01K?
Samsung Electronics Co., Ltd. leads G01K with 131 patents, making it the most active assignee in this technology area.
How is patent data for G01K 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., G01) is a broad technology category. Subclasses like G01K 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.