ClassID:

165294

G01F23/02 - CPC Classification

Classification description:

Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid

Recent Application in this class:
#1
20260153103
2026-06-04

FLUID LEVEL INDICATOR FOR A HYDRAULIC RESERVOIR

#2
20260145435
2026-05-28

LIQUID LEVEL DETECTION UNIT AND LIQUID EJECTION DEVICE

#3
20260036460
2026-02-05

CONTAINER WITH A SAFETY MEASURING CAP

#4
20250381349
2025-12-18

System and Method for Syringe Fluid Fill Verification and Image Recognition of Power Injector System Features

#5
20250304904
2025-10-02

LIQUID LEVEL AND FLOW RATE DETECTION WITHIN A CELL PROCESSING SYSTEM

#6
20250224266
2025-07-10

3D PRINTED SIGHT-GLASS FOR CHEMICAL DOSING APPLICATION

#7
20250178819
2025-06-05

INSULATED CONTAINERS WITH VIEWING WINDOW

#8
20250130090
2025-04-24

SELF-READING WATER METER

#9
20250102300
2025-03-27

AEROSOL-GENERATING SYSTEM WITH PAIRS OF ELECTRODES

#10
20250075900
2025-03-06

FOAM DETECTION TECHNIQUE-ALGORITHM FOR STEAM BOILERS USING LWCO DEVICE

#11
20240418556
2024-12-19

SYSTEM AND METHOD FOR FUEL MONITORING AND SPILL PREVENTION

#12
20240418555
2024-12-19

SYSTEM AND METHOD FOR FUEL MONITORING AND SPILL PREVENTION

#13
20240416020
2024-12-19

SPHERICAL CANISTER

#14
20240385023
2024-11-21

Graduated Cylinder

#15
20240350745
2024-10-24

SYSTEM AND METHOD FOR SYRINGE FLUID FILL VERIFICATION AND IMAGE RECOGNITION OF POWER INJECTOR SYSTEM FEATURES

#16
20240316256
2024-09-26

OPTICAL LEVEL CONTROL SYSTEM

#17
20240263987
2024-08-08

Device for Indicating a Fluid Level

#18
20240140773
2024-05-02

Canning funnel with headspace gauge

#19
20240090573
2024-03-21

AEROSOL PROVISIONS SYSTEMS

#20
20230310758
2023-10-05

System and Method for Syringe Fluid Fill Verification and Image Recognition of Power Injector System Features

#21
20230266378
2023-08-24

Fault gas detection system for a liquid filled high voltage transformer

#22
20230228609
2023-07-20

MACHINE FLUID CONDITION MONITORING SYSTEM

#23
20230221162
2023-07-13

LN2 fill gauge level indicating device

#24
20230201782
2023-06-29

Universal Mixture Maker

#25
20230184574
2023-06-15

APPARATUS AND METHOD OF SUPPLYING CHEMICAL LIQUID AND SUBSTRATE TREATING APPARATUS

#26
20230090797
2023-03-23

Optical level control system

#27
20230057254
2023-02-23

System and method for fuel monitoring and spill prevention

#28
20220341843
2022-10-27

ASSAY CARTRIDGES AND METHODS OF USING THE SAME

#29
20220228983
2022-07-21

LIQUID SENSOR AND HYDRAULIC UNIT

#30
20220211954
2022-07-07

System and method for syringe fluid fill verification and image recognition of power injector system features

#31
20220196452
2022-06-23

Illumination assembly for liquid level gauge

#32
20220184255
2022-06-16

Personal Sanitation Sprayer

#33
20220118445
2022-04-21

Liquid evaluation

#34
20220074778
2022-03-10

Device for indicating a fluid level

#35
20220031926
2022-02-03

Spherical Canister

#36
20210341330
2021-11-04

System for automatically measuring discharge in real-time based on cctv image and method thereof

#37
20210310849
2021-10-07

LN2 fill gauge level indicating device

#38
20210284427
2021-09-16

Dual compartment shaker bottle

#39
20210239505
2021-08-05

Oil Sight Glass

#40
20210239499
2021-08-05

DEVICE FOR INDICATING AND/OR CHECKING FLUIDS

#41
20210199432
2021-07-01

AEROSOL-GENERATING SYSTEM WITH PAIRS OF ELECTRODES

#42
20210170113
2021-06-10

System and method for syringe fluid fill verification and image recognition of power injector system features

#43
20210155378
2021-05-27

Container with fill gauge

#44
20210102867
2021-04-08

Tracking and transmitting axle monitoring system

#45
20210003443
2021-01-07

Visual liquid level indicator

#46
20200400479
2020-12-24

Lighting and Indicator Assembly for Level Gauges

#47
20200363254
2020-11-19

Fluid level gauge or reservoir with built-in light source

#48
20200330675
2020-10-22

Optical level control system

#49
20200292369
2020-09-17

Liquid flow indicator device and method of use

#50
20200262644
2020-08-20

Fluid evaluation devices for oil and gas applications

#51
20200209040
2020-07-02

Flow sensor gauge

#52
20200149946
2020-05-14

Orbit Baby Bottle Measurement

#53
20200109983
2020-04-09

Oil Sight Glass

#54
20200056921
2020-02-20

Machine fluid condition monitoring system

#55
20200056920
2020-02-20

Machine fluid condition monitoring system

#56
20200054116
2020-02-20

HYDRATION SLEEVE AND BLADDER AND RELATED SYSTEMS AND METHODS

#57
20200023143
2020-01-23

System and method for syringe fluid fill verification and image recognition of power injector system features

#58
20200018632
2020-01-16

Flowmeter having an adjustable shield with flow scales

#59
20200018631
2020-01-16

Flowmeter having a fitting assembly with drainage reservoir, tap, and plug

#60
20190390995
2019-12-26

Thermal adjusted hydraulic fluid gage

#61
20190373939
2019-12-12

Methods of Making a Bigger Volume of Foods for Weight Control

#62
20190343128
2019-11-14

DO IT YOURSELF CANNABIS BAKING KIT

#63
20190331517
2019-10-31

Custom sight level gauge, field assembly

#64
20190316949
2019-10-17

Tubular Dipstick Apparatus

#65
20190293468
2019-09-26

Injectable Medication Measurement Card

#66
20190285505
2019-09-19

Water Leak Test System and Method

#67
20190195672
2019-06-27

Fluid level gauge or reservoir with built-in light source

#68
20190178787
2019-06-13

Assay cartridges and methods of using the same

#69
20190170557
2019-06-06

Mica water level gauge glass

#70
20190137320
2019-05-09

Visual liquid level indicator

#71
20190128724
2019-05-02

Determining a fill level of a hydrodynamic clutch

#72
20190063986
2019-02-28

FLOAT INDICATOR DEVICE AND METHOD

#73
20190017859
2019-01-17

Bin level indicator

#74
20190009290
2019-01-10

Spray gun cups, receptacles, and methods of use

#75
20190003702
2019-01-03

Open sight glass system

#76
20180340876
2018-11-29

Portable blood viscosity measurement apparatus

#77
20180306630
2018-10-25

MOLDED SIGHT TUBE FOR FLUID LEVEL VERIFICATION APPARATUS

#78
20180296771
2018-10-18

System and method for syringe fluid fill verification and image recognition of power injector system features

#79
20180291590
2018-10-11

Small-sized construction machine

#80
20180258918
2018-09-13

Wind turbine having a liquid circuit and components therefore

#81
20180245964
2018-08-30

Volume measurement apparatus

#82
20180203201
2018-07-19

Sight glass

#83
20180188097
2018-07-05

Measuring apparatus system and method

#84
20180185869
2018-07-05

Spray gun cups, receptacles, and methods of use

#85
20180177238
2018-06-28

Aerosol-generating system with pairs of electrodes

#86
20180143060
2018-05-24

Structural unit for arrangement at a hydraulic fluid tank of a jet engine

#87
20180128669
2018-05-10

Indication type level indicator including total reflection prism

#88
20180113018
2018-04-26

System for approximating the contents of a dispensing container

#89
20180105294
2018-04-19

METHODS AND SYSTEMS FOR PREFILLING SYRINGES

#90
20180104387
2018-04-19

Sensor with electrical contact protection for use in fluid collection canister and negative pressure wound therapy systems including same

#91
20180073907
2018-03-15

Oil sight glass

#92
20180068460
2018-03-08

Liquid Level Detecting System and Method thereof

#93
20180045548
2018-02-15

Apparatus and method for measuring a volume of a liquor dispensed from a bottle

#94
20180038725
2018-02-08

Self-filling graduated cylinder system

#95
20180017214
2018-01-18

COMPOSITE LPG TANK TRAILER

#96
20170328760
2017-11-16

MEASURING APPARATUS SYSTEM AND METHOD

#97
20170307431
2017-10-26

Self-Filling Graduated Cylinder System

#98
20170292868
2017-10-12

Device and method for evaluating amount of biological sample in a specimen container

#99
20170290993
2017-10-12

System and method for syringe fluid fill verification

#100
20170284853
2017-10-05

Multiphase meter calibration system and methods thereof

#101
20170202343
2017-07-20

Hydration sleeve and bladder and related systems and methods

#102
20170162277
2017-06-08

VISUAL INDICATOR AND FLUID DISPENSER

#103
20170138780
2017-05-18

Visual liquid level indicator

#104
20170138777
2017-05-18

Fluid level visualization systems

#105
20170115152
2017-04-27

Apparatus and method for liquid-level detection of enclosure tank

#106
20170100738
2017-04-13

Metered Dosing Method and Mechanisms Thereof

#107
20170059385
2017-03-02

Recreational vehicle wastewater tank measurement system and method

#108
20170056604
2017-03-02

System and method for syringe fluid fill verification and image recognition of power injector system features

#109
20170056603
2017-03-02

System and method for syringe fluid fill verification and image recognition of power injector system features

#110
20160377472
2016-12-29

FLUID LEVEL VERIFICATION APPARATUS

#111
20160356636
2016-12-08

Adjustable sight gauge and drum breather assembly and method of inspecting fluid level with same

#112
20160331877
2016-11-17

Sensor with electrical contact protection for use in fluid collection canister and negative pressure wound therapy systems including same

#113
20160305810
2016-10-20

Machine fluid condition monitoring system

#114
20160305295
2016-10-20

Condition monitoring sight glass with remote sensing ports

#115
20160265958
2016-09-15

Liquid containment and measurement apparatus and method

#116
20160216147
2016-07-28

Bin level inicator

#117
20160195103
2016-07-07

Turbo machine having a sealing unit, maintenance method, and associated maintenance device

#118
20160146655
2016-05-26

MONITORING DEVICE FOR GASEOUS FUEL

#119
20160133345
2016-05-12

VISUAL INDICATOR AND FLUID DISPENSER

#120
20150330577
2015-11-19

Expansion tank with a predictive sensor

#121
20150300908
2015-10-22

Rotorcraft actuator seal leakage monitor

#122
20150259100
2015-09-17

Device for indicating the filling level of a container

#123
20150253179
2015-09-10

Magnetic level gauge indicator with ultra-wide viewing angle

#124
20150219484
2015-08-06

SIGHT GLASS ASSEMBLY

#125
20150153213
2015-06-04

Visual indicator with sensor

#126
20150128627
2015-05-14

Liquid level indicator, turbo compressor, and turbo refrigerator

#127
20150114109
2015-04-30

Adjustable fluid level verification apparatus

#128
20150097103
2015-04-09

FUEL GAUGE HOLDER

#129
20150090511
2015-04-02

Reducing agent tank and work vehicle

#130
20150007408
2015-01-08

Sight glass cleaning apparatus

#131
20140318480
2014-10-30

Magnetic liquid level gauge for boiler drum water level measurement

#132
20140238156
2014-08-28

Drainable sight glass and associated methods

#133
20140203630
2014-07-24

Oil level indicator for rotary wing aircraft transmission

#134
20140042345
2014-02-13

Visual indicator with sensor

#135
20130343620
2013-12-26

Drug solution inspection device and drug solution inspection method

#136
20130255676
2013-10-03

Vaporizer anesthesia level detector

#137
20130167631
2013-07-04

Compact Reflective Level Indicator with Glass Element

#138
20130161023
2013-06-27

Standalone liquid level sensing apparatus for tensioner system

#139
20130136672
2013-05-30

Electrically conductive pipette tip

#140
20120324996
2012-12-27

Magnetic level indicator

#141
20120285273
2012-11-15

Particulate material monitoring system

#142
20120285241
2012-11-15

Particulate material monitoring system

#143
20120280063
2012-11-08

Paint cup assembly with an outlet valve

#144
20120279970
2012-11-08

Paint cup assembly with an extended ring

#145
20120279887
2012-11-08

PAINT CUP ASSEMBLY WITH A COLLAPSIBLE LINER

#146
20120279613
2012-11-08

Paint Cup Assembly Support Structure

#147
20120279609
2012-11-08

Method of using a paint cup assembly

#148
20120269310
2012-10-25

Dynamic port for measuring reactor coolant pump bearing oil level

#149
20120197555
2012-08-02

Ultrasonic water level gauge and control device

#150
20120191051
2012-07-26

VISUAL INDICATOR AND FLUID DISPENSER

#151
20120190589
2012-07-26

Assay cartridges and methods of using the same

#152
20120181273
2012-07-19

Liquid collection system and related methods

#153
20120147713
2012-06-14

Fluid indicator

#154
20120122201
2012-05-17

Gas Flow Rate And Liquid Level Monitoring Apparatus

#155
20120036927
2012-02-16

Redundant level measuring system

#156
20120034403
2012-02-09

Hermetic glass-to-metal seal assembly and method of manufacturing hermetic glass-to-metal seal assembly

#157
20120019921
2012-01-26

Liquid tank, viewing device for under-liquid observation, and optical film

#158
20110303003
2011-12-15

Accumulator with both direct and remote quantity level indication

#159
20110283788
2011-11-24

Boat steering fluid sight gauge

#160
20110253922
2011-10-20

Bidirectional sleeved/plug ball check valve

#161
20110204086
2011-08-25

Refillable Container with a Graduated Neck Extension

#162
20110201099
2011-08-18

Assay cartridges and method of using the same

#163
20110192433
2011-08-11

Chemical delivery data acquisition system

#164
20110058961
2011-03-10

Combined oil level or condition sensor and sight oil level gage

#165
20110035920
2011-02-17

CLEANABLE SIGHT GLASS

#166
20110011891
2011-01-20

METHOD AND DEVICE TO MEASURE THE LEVEL OF PRESSURIZED LIQUID IN A SIPHON CONTAINER

#167
20100329411
2010-12-30

Dynamic port for measuring reactor coolant pump bearing oil level

#168
20100290118
2010-11-18

LIQUID TANK, VIEWING DEVICE FOR UNDER-LIQUID OBSERVATION, AND OPTICAL FILM

#169
20100269584
2010-10-28

Illuminated sight glass

#170
20100191200
2010-07-29

Liquid collection system and related methods

#171
20100185167
2010-07-22

Liquid collection system and related methods

#172
20100185166
2010-07-22

Liquid collection system and related methods

#173
20100174249
2010-07-08

Liquid collection system and related methods

#174
20100049150
2010-02-25

Sensor with electrical contact protection for use in fluid collection canister and negative pressure wound therapy systems including same

#175
20100031744
2010-02-11

Thermal Liquid Container Having Liquid Level Indicator

#176
20100011854
2010-01-21

Sand level monitoring system

#177
20100000317
2010-01-07

DEVICE FOR INDICATING A LEVEL OF FLUID COMPRISING A MOVABLE ARRANGED LIGHTING MEMBER WHICH IS PRESENT INSIDE A CONTAINER OF THE DEVICE

#178
20090314101
2009-12-24

Measuring apparatus system and method

#179
20090308893
2009-12-17

METHOD AND DEVICE TO MEASURE THE LEVEL OF PRESSURIZED LIQUID IN A SIPHON CONTAINER

#180
20090114012
2009-05-07

Filling level indicator having an explosion-proof housing

#181
20090104492
2009-04-23

Fuel cell system and method of computing fuel level

#182
20090056438
2009-03-05

Gage Cock Ball Valve

#183
20090031799
2009-02-05

Float diagnostics for level measurement

#184
20090013781
2009-01-15

Method and device to measure the level of pressurized liquid in a siphon container

#185
20080253934
2008-10-16

AUTOMATIC PRECISION NON-CONTACT OPEN-LOOP FLUID DISPENSING

#186
20080247153
2008-10-09

Illuminated plastic fuel tank

#187
20080179344
2008-07-31

Liquid collection system and related methods

#188
20080176044
2008-07-24

WINDOW FOR ACID-BASE TANK

#189
20080173088
2008-07-24

Combined sight oil level gage and ultrasonic sensor

#190
20080173087
2008-07-24

Locomotive fuel tank sight glass in-situ cleaning system

#191
20080105330
2008-05-08

STORAGE DEVICE CAPABLE OF DETECTING LIQUID LEVEL

#192
20080099509
2008-05-01

COFFEE GROUND DISPENSER

#193
20080066543
2008-03-20

Combined oil level or condition sensor and sight oil level gage

#194
20080038591
2008-02-14

FUEL STORAGE DEVICE CAPABLE OF DETECTING LIQUID LEVEL

#195
20080035647
2008-02-14

Expansion tank with a predictive sensor

#196
20080022768
2008-01-31

Top view liquid sight level indicator

#197
20080006086
2008-01-10

Mounting structure for an oil level sight glass for an internal combustion engine and engine incorporating same

#198
20070267412
2007-11-22

Fluid supply assembly with measuring guide

#199
20070227272
2007-10-04

TANK MASS MEASUREMENT ASSEMBLY

#200
20070158056
2007-07-12

Tank for a system that outputs liquid at a user-defined constant temperature

#201
20070144252
2007-06-28

Solid state illuminator for bi-color ported water level gauges

#202
20070125171
2007-06-07

Liquid level detector and liquid processing system provided with the same

#203
20070089507
2007-04-26

Measuring Reservoir

#204
20070062277
2007-03-22

Fluid intake tracker

#205
20070051172
2007-03-08

Method and apparatus for determining the volume of fuel in a vehicle fuel tank

#206
20070045355
2007-03-01

Bulk container with collapsible support

#207
20060281000
2006-12-14

Battery electrolyte level control system

#208
20060193200
2006-08-31

Measurement indicator for a blender cup or the like

#209
20060180075
2006-08-17

Fluid supply assembly with measuring guide

#210
20060130572
2006-06-22

Tank mass measurement assembly

#211
20060070438
2006-04-06

Apparatus and method for determining a liquid level in a steam drum

#212
20050284219
2005-12-29

Solid state illuminator for bi-color ported water level gauges

#213
20050268714
2005-12-08

Fluid measurement apparatus and method

#214
20050257613
2005-11-24

Fluid level gauge comprising synthetic sapphire shielding and/or viewing lense

#215
20050229974
2005-10-20

Non-invasive gauge glass liquid level sensor apparatus

#216
20050155425
2005-07-21

Solid state illuminator for bi-color ported water level gauges

#217
20050109794
2005-05-26

Carafe with contents volume indicator

#218
20050095723
2005-05-05

Automatic precision non-contact open-loop fluid dispensing

#219
20050092082
2005-05-05

Solid state illuminator for bi-colored ported water level gauges

#220
20050023239
2005-02-03

Indication device for remaining volume of feeding bottle

#221
20050008444
2005-01-13

Limited-torque plastic screw for attaching column-mounted elements of liquid-level gauges and feeding liquids thereto

#222
17246620
2025-04-08

Liquid dosing medication dispenser

#223
17067735
2023-01-10

Group electronic game or poll using beverage sensors

#224
16210906
2019-11-26

Self-filling graduated cylinder system

#225
16207124
2020-10-13

Electronic game with integrated beverage sensor

#226
15948285
2019-07-16

Sight port system for sulfur process

#227
15918073
2019-01-22

Liquid leak measurement system

#228
15611689
2019-01-29

Arcade game with integrated beverage sensor

#229
15378819
2019-08-27

Virtual sight glass for a portable beverage dispensing container

#230
15130334
2019-01-01

Applicator system for extrusive dispensing of work material from collapsible cartridge

#231
14250895
2016-05-10

Rain gauge with illuminated float

#232
13855852
2015-04-14

Measuring cup assembly