G05F SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
Introduced: September 1968
Last revised: January 1990
Classification Context
- Section:
- PHYSICS
- Class:
- CONTROLLING; REGULATING
- Subclass:
- SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
Description
G05F encompasses control systems that regulate electrical or magnetic variables to maintain them at desired values or within specified ranges. These systems include voltage regulators, current regulators, magnetic field controllers, and frequency stabilizers used in power supplies, electrical machinery, and electromagnetic devices. The subclass covers both analog and digital regulation methods, feedback control mechanisms, and various sensing and actuation technologies employed to achieve stable operation of electrical and magnetic parameters. Applications range from simple linear voltage regulators to complex switching power supplies and electromagnetic field management systems.
Filing statistics
IPC subclass G05F 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
In class comparison
G05F ranks 3rd of 4 subclasses with filings in G05, with 38,687 applications between 2013 and 2023, 5.7% of the class. Annual filings declined 19% from 2013 to 2023, below the class as a whole (+56%).
| Rank | Subclass | Title | Applications | Share |
|---|---|---|---|---|
| 1 | G05B, Control or Regulating Systems in General; Functional Elements of Such Systems; Monitoring or Testing Arrangements for Such Systems or Elements | Control or Regulating Systems in General; Functional Elements of Such Systems; Monitoring or Testing Arrangements for Such Systems or Elements | 367,854 | 54.5% |
| 2 | G05D, Systems for Controlling or Regulating Non-Electric Variables | Systems for Controlling or Regulating Non-Electric Variables | 251,217 | 37.2% |
| 3 | G05F | Systems for Regulating Electric or Magnetic Variables | 38,687 | 5.7% |
| 4 | G05G, Control Devices or Systems Insofar as Characterised by Mechanical Features Only | Control Devices or Systems Insofar as Characterised by Mechanical Features Only | 17,259 | 2.6% |
Source: EPO PATSTAT, worldwide filings
Additional Content
Regulation of current or voltage specially adapted for use in electronic time-pieces Regulating power supply of digital computers Circuit arrangements for obtaining desired operating characteristics of electromagnets with armatures Regulating electric power distribution networks Regulating the charging of batteries Regulation of the output of static converters, e.g. switching regulators Regulation of the output of electric generators , Controlling transformers, reactors or choke coils Regulating frequency response, gain, maximum output, amplitude or bandwidth of amplifiers Regulating tuning of resonant circuits Controlling generators of electronic oscillations or pulses Regulating characteristics of transmission lines Controlling electric light sources , , , , Electric control of X-ray apparatus
Related Keywords
4 direct subcodes
Child Classifications
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- G05F 1/00 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
- G05F 3/00 Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
- G05F 5/00 Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output
- G05F 7/00 Regulating magnetic variables
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