PlainPatent

CPC technology class · G01

G01T - Measurement OF Nuclear OR X-radiation

Measurement of nuclear or x-radiation. 6,488 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

6,488
US patents granted
G01
Parent CPC class
20
Active assignees
-5%
5-yr velocity

The verdict

Measurement OF Nuclear OR X-radiation ranks #221 of 670 CPC technology areas - 6,488 US patents granted since 2015, with filing down 5% over five years.

#221
of 670 CPC technology areas
6,488
US patents granted, 2015–2025
Canon
leading assignee (308)
-5%
filing velocity, last 5 yrs
Top assignee: Canon Kabushiki Kaisha (308 patents)

CPC subclass G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION - covers 6,488 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 G01T is shaped by 20 distinct companies actively filing in this space. Canon Kabushiki Kaisha leads with 308 patents, followed by Hamamatsu Photonics K.k. at 131 grants and Shenzhen Xpectvision Technology Co., Ltd. at 130.

Filing activity in G01T is down 5% 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 G01T innovation accelerating?

US utility-patent grants per year in G01T, 2015–2025 - recent five years are down 5% versus 2015–2019.

200300400500600700 20152016201720182019202020212022202320242025 298

Who leads G01T?

The 12 most active assignees in MEASUREMENT OF NUCLEAR OR X-RADIATION - wider bars mean more grants

patents

What this shows Canon is the most active filer in G01T, holding 308 of the 6,488 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 G01T
Rank Company Patents in G01T
#1 Koniniklijke Philips N.v. 259
#2 Hamamatsu Photonics K.k. 131
#3 Shenzhen Xpectvision Technology Co., Ltd. 130
#4 Siemens Medical Solutions USA, Inc. 111
#5 Toshiba Medical Systems Corporation 103
#6 Shanghai United Imaging Healthcare Co., Ltd. 93
#7 Canon Medical Systems Corporation 91
#8 Konica Minolta, Inc. 72
#9 Siemens Healthcare Limited 72
#10 Nuctech Company Limited 63
#11 Shimadzu Corporation 62
#12 Lawrence Livermore National Security, Llc 54
#13 Saint-gobain Ceramics & Plastics, Inc. 53
#14 Carestream Health, Inc. 41
#15 GE Precision Healthcare Llc 37
#16 Analogic Corporation 32
#17 Prismatic Sensors AB 32
#18 Radiation Monitoring Devices, Inc. 30
#19 Varex Imaging Corporation 28
#20 The Research Foundation For The State University Of New York 26

About This Class

CPC subclass G01T belongs to class G01.

6,488 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 G01T 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 G01T assignees by class footprint. Bubble size = patents in G01T. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 G01T assignees by class footprint. Bubble size = patents in G01T. 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 G01T Avg claims / patent (company-wide) Koniniklijke PhilipsHamamatsu Photonics K…Shenzhen Xpectvision…Siemens Medical Solut…Toshiba Medical Syste…Shanghai United Imagi…Canon Medical SystemsKonica MinoltaSiemens HealthcareNuctechShimadzuLawrence Livermore Na…Saint-gobain Ceramics…Carestream Health
Top 14 G01T assignees by class footprint. Bubble size = patents in G01T. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class G01T?
CPC subclass G01T covers MEASUREMENT OF NUCLEAR OR X-RADIATION. It belongs to CPC class G01 (MEASURING; TESTING), with 6,488 US utility patents granted since 2015.
How many patents have been filed in G01T?
6,488 US utility patents were granted in CPC subclass G01T between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in G01T?
Canon Kabushiki Kaisha leads G01T with 308 patents, making it the most active assignee in this technology area.
How is patent data for G01T 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 G01T 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.