PlainPatent

CPC technology class · G01

G01F - Measuring Volume

Measuring volume, volume flow, mass flow or liquid level; metering by volume. 10,911 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

10,911
US patents granted
G01
Parent CPC class
20
Active assignees
+23%
5-yr velocity

The verdict

Measuring Volume ranks #163 of 670 CPC technology areas - 10,911 US patents granted since 2015, with filing up 23% over five years.

#163
of 670 CPC technology areas
10,911
US patents granted, 2015–2025
Endress+Hauser Flowtec
leading assignee (279)
+23%
filing velocity, last 5 yrs
Top assignee: Endress+hauser Flowtec Ag (279 patents)

CPC subclass G01F - MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME - covers 10,911 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 G01F is shaped by 20 distinct companies actively filing in this space. Endress+hauser Flowtec Ag leads with 279 patents, followed by DEKA Products Limited Parternship at 187 grants and VEGA Grieshaber KG at 180.

Filing activity in G01F is up 23% 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 G01F innovation accelerating?

US utility-patent grants per year in G01F, 2015–2025 - recent five years are up 23% versus 2015–2019.

6008001,0001,2001,400 20152016201720182019202020212022202320242025 644

Who leads G01F?

The 12 most active assignees in MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME - wider bars mean more grants

patents

What this shows Endress+Hauser Flowtec is the most active filer in G01F, holding 279 of the 10,911 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 G01F
Rank Company Patents in G01F
#1 Endress+hauser Flowtec Ag 279
#2 DEKA Products Limited Parternship 187
#3 VEGA Grieshaber KG 180
#4 Micro Motion, Inc. 175
#5 Saudi Arabian OIL Company 130
#6 Endress+hauser Se+co. KG 124
#7 Hitachi Automotive Systems, Ltd. 118
#8 Schlumberger Technology Corporation 96
#9 Rosemount TANK Radar AB 95
#10 Krohne Ag 69
#11 Krohne Messtechnik Gmbh 66
#12 Rosemount Inc. 61
#13 Horiba STEC, Co., Ltd. 58
#14 Endress+hauser Gmbh+co.kg 56
#15 Fujikin Incorporated 45
#16 Mueller International, Llc 44
#17 Rosemount Aerospace Inc. 41
#18 Cameron International Corporation 39
#19 Azbil Corporation 35
#20 Yokogawa Electric Corporation 34

About This Class

CPC subclass G01F belongs to class G01.

10,911 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 G01F 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 G01F assignees by class footprint. Bubble size = patents in G01F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 G01F assignees by class footprint. Bubble size = patents in G01F. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 5101520 050100150200250300 Patents in G01F Avg claims / patent (company-wide) Endress+Hauser FlowtecDeka Products Partern…Vega Grieshaber KgMicro MotionSaudi Arabian OilEndress+Hauser Se+ KgHitachi Automotive Sy…Schlumberger Technolo…Rosemount Tank Radar…KrohneKrohne MesstechnikRosemountHoriba StecEndress+Hauser +Kg
Top 14 G01F assignees by class footprint. Bubble size = patents in G01F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class G01F?
CPC subclass G01F covers MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME. It belongs to CPC class G01 (MEASURING; TESTING), with 10,911 US utility patents granted since 2015.
How many patents have been filed in G01F?
10,911 US utility patents were granted in CPC subclass G01F between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in G01F?
Endress+hauser Flowtec Ag leads G01F with 279 patents, making it the most active assignee in this technology area.
How is patent data for G01F 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 G01F 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.