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 grant trajectory.

Compiled by PlainPatent · May 15, 2026

8,803
US patents granted: #12/18
in G01: 2.2%
G01 class share: +26%
5-yr velocity

The verdict

According to USPTO PatentsView, Measuring Temperature ranks #182 of 670 CPC technology areas - 8,803 US patents granted since 2015, with recorded grant volume up 26% over five years.

#182
of 670 CPC technology areas: 8,803
US patents granted, 2015–2025: Samsung
leading assignee (131): +26%
grant velocity, last 5 yrs

How G01K's grant cadence moved

Between 2020–2024, G01K recorded 4,356 grants versus 3,455 in 2015–2019 (+26% equal-window velocity). Across complete years, output peaked in 2022 at 911 grants and bottomed in 2015 at 479 (+90% peak-over-trough). Lead assignee Rosemount Aerospace Inc. holds 0.6% of the class ; the top three share 1.8%.

Leaderboard read

G01K concentration, lead at 0.6%

Rosemount Aerospace Inc. leads this historical grant record at 0.6% of G01K - us corporation assignees hold 50% of class grants (1,286 of 2,571). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 0.6%
Top three share: 1.8%
Lead over #2: 1

Where G01K sits inside G01

Among 18 subclasses in G01 (MEASURING; Testing), G01K ranks #12 and holds 2.2% of the parent class's 393,430 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

G01N 115,972 G01R 53,716 G01S 52,756 G01C 32,360 G01B 22,043 G01J 16,402 G01M 14,845 G01V 14,307

Rising assignees active in G01K

Company-wide grant multiples (2022–2024 vs 2019–2021) among assignees with ≥5 patents in this subclass. Growth is company-wide; class patent counts are subclass-specific.

#1 TE Connectivity Solutions GmbH 68x 4 → 271 company-wide · 9 in G01K
#2 Imam Mohammad IBN Saud Islamic University 27x 0 → 27 company-wide · 5 in G01K
#3 Mavagail Technology, LLC 11x 0 → 11 company-wide · 5 in G01K
#4 Beamex OY AB 8.00x 0 → 8 company-wide · 5 in G01K
#5 Celestial AI Inc. 7.00x 0 → 7 company-wide · 8 in G01K

G01K grants by year, peak 2022 (911)

US utility-patent grants per year in G01K, 2015–2025 - recent five years are up 26% versus 2015–2019.

Rosemount Aerospace

53
Kidde

52
Rosemount

51
Arc Devices

47
Varcode

45
Endress+Hauser Wetzer…

41
Watlow Electric…

40
Gecko Robotics

32
Siemens Energy

26
Shibaura

25
Temptime

24
Fluke

20

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.

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

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).

Classes near G01K's 8,803-grant footprint

Nationwide nearest neighbors for G01K (#182 of 670 by volume ; lead share 1.5%) - not the G01 parent-class siblings above.

Nearest by grant volume

B01F 8,785 F25D 8,866 C03C 8,986 B23P 8,569

Nearest by lead-assignee share

A61L 1.5% C07H 1.5% C07K 1.5% C07D 1.5%

Questions about G01K

Which company holds the most patents in G01K?

Samsung Electronics Co., Ltd. leads G01K with 131 patents (0.6% of the subclass). By PatentsView assignee type, us corporations account for 50% of class grants.

Which G01K assignees grew fastest recently?

Among assignees with ≥5 grants in G01K, TE Connectivity Solutions GmbH shows the highest company-wide grant multiple (68x: 4 grants in 2019–2021 → 271 in 2022–2024) while holding 9 patents in this subclass. Growth is company-wide, not class-only.

How does G01K compare inside parent class G01?

Inside G01 (MEASURING; Testing), G01K ranks #12 of 18 subclasses by grant volume and holds 2.2% of the parent class total. The largest sibling is G01N (115,972 grants).

What to do with this data

G01K in context - here's where to go next.

Rosemount Aerospace Inc. leads G01K with 53 grants in this class. See full portfolio
G01K ranks #182 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class G01, the largest sibling subclass is G01N with 115,972 grants. Explore G01N

Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.

Methodology - G01K figures are USPTO PatentsView granted-utility totals for this subclass (8,803 grants in the tracked window).

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.