PlainPatent

CPC technology class · G01

G01J - Measurement OF Intensity

Measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light; colorimetry; radiation pyrometry. 16,402 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

16,402
US patents granted
G01
Parent CPC class
20
Active assignees
+19%
5-yr velocity

The verdict

Measurement OF Intensity ranks #115 of 670 CPC technology areas - 16,402 US patents granted since 2015, with filing up 19% over five years.

#115
of 670 CPC technology areas
16,402
US patents granted, 2015–2025
Samsung
leading assignee (389)
+19%
filing velocity, last 5 yrs
Top assignee: Samsung Electronics Co., Ltd. (389 patents)

CPC subclass G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY - covers 16,402 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 G01J is shaped by 20 distinct companies actively filing in this space. Samsung Electronics Co., Ltd. leads with 389 patents, followed by Viavi Solutions Inc. at 145 grants and Raytheon Company at 142.

Filing activity in G01J is up 19% 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 G01J innovation accelerating?

US utility-patent grants per year in G01J, 2015–2025 - recent five years are up 19% versus 2015–2019.

8001,0001,2001,4001,6001,800 20152016201720182019202020212022202320242025 1,007

Who leads G01J?

The 12 most active assignees in MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY - wider bars mean more grants

patents

What this shows Samsung is the most active filer in G01J, holding 389 of the 16,402 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 G01J
Rank Company Patents in G01J
#1 Hamamatsu Photonics K.k. 253
#2 Viavi Solutions Inc. 145
#3 Raytheon Company 142
#4 Commissariat A L'energie Atomique ET AUX Energies Alternatives 117
#5 Konica Minolta, Inc. 91
#6 Pixart Imaging Inc. 90
#7 Halliburton Energy Services, Inc. 88
#8 Shimadzu Corporation 84
#9 Tsinghua University 64
#10 ASML Netherlands B.v. 55
#11 Rebellion Photonics, Inc. 52
#12 Cilag Gmbh International 50
#13 BAE Systems Information And Electronic Systems Integration Inc. 50
#14 Wavefront Research, Inc. 50
#15 ARC Devices Limited 50
#16 Olympus Corporation 49
#17 Kla-tencor Corporation 49
#18 OMNI Medsci, Inc. 48
#19 FLIR Systems, Inc. 47
#20 Stmicroelectronics (research & Development) Limited 44

About This Class

CPC subclass G01J belongs to class G01.

16,402 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 G01J 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 G01J assignees by class footprint. Bubble size = patents in G01J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 G01J assignees by class footprint. Bubble size = patents in G01J. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 050100150200250300 Patents in G01J Avg claims / patent (company-wide) Hamamatsu Photonics K…Viavi SolutionsRaytheonCommissariat A L'ener…Konica MinoltaPixart ImagingHalliburton Energy Se…ShimadzuTsinghua UniversityAsml Netherlands B VRebellion PhotonicsCilag InternationalBae Systems Informati…Wavefront Research
Top 14 G01J assignees by class footprint. Bubble size = patents in G01J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class G01J?
CPC subclass G01J covers MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY. It belongs to CPC class G01 (MEASURING; TESTING), with 16,402 US utility patents granted since 2015.
How many patents have been filed in G01J?
16,402 US utility patents were granted in CPC subclass G01J between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in G01J?
Samsung Electronics Co., Ltd. leads G01J with 389 patents, making it the most active assignee in this technology area.
How is patent data for G01J 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 G01J 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.