IPC Main Group
G05D 9/00 Level control, e.g. controlling quantity of material stored in vessel
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PHYSICS
- Class:
- CONTROLLING; REGULATING
- Subclass:
- SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
Additional Content
Controlling the liquid level in sedimentation arrangements Ink level control devices Controlling water level for boilers Controlling level of liquid in liquid pool electrodes in electric discharge tubes or lamps ,
Related Keywords
control of LEVEL(S) of liquidcontrolling LIQUID(S)
3 direct subcodes
Child Classifications
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Top Applicants
Top 10 applicants by patent filingsfor class G05, 2013–2023, worldwide · Source: EPO PATSTAT
- SIEMENS DE 4,725
- SGCC(STATE GRID CORPORATION OF CHINA) 4,571
- FANUC JP 4,233
- MITSUBISHI ELECTRIC CORPORATION JP 3,143
- FANUC 2,981
- ROBERT BOSCH DE 2,813
- CHINESE ACADEMY OF SCIENCES 2,500
- LG ELECTRONICS KR 2,182
- OMRON CORPORATION JP 2,036
- SAMSUNG ELECTRONICS COMPANY KR 1,981