IPC Subgroup
G05F 1/1 Regulating voltage or current
Introduced: September 1968
Last revised: January 2006
Full Title
Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems > Regulating voltage or current
Classification Context
- Section:
- PHYSICS
- Class:
- CONTROLLING; REGULATING
- Subclass:
- SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
Additional Content
Limiting references
Regulating electric characteristics of arcs
Application references
Regulating voltage or current in electric railways
3 direct subcodes
Child Classifications
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- G05F 1/12 wherein the variable is actually regulated by the final control device is AC
- G05F 1/46 wherein the variable actually regulated by the final control device is DC
- G05F 1/625 wherein it is irrelevant whether the variable actually regulated is AC or DC
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