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
Filing statistics
IPC G05F 1/1 belongs to the parent subclass G05F, which recorded 38,687 patent applications worldwide between 2013 and 2023. Annual filings declined from 3,937 in 2013 to 3,173 in 2023 (-19%). The most active applicants in class G05 are SIEMENS (4,725 applications), SGCC(STATE GRID CORPORATION OF CHINA) (4,571 applications) and FANUC (4,233 applications).
Source: EPO PATSTAT, worldwide filings
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