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

Filing statistics

CPC G05F 1/00 belongs to the parent subclass G05F, which recorded 34,553 patent applications worldwide between 2013 and 2023. Annual filings declined from 2,962 in 2013 to 2,659 in 2023 (-10%), peaking at 3,775 applications in 2017. The most active applicants in class G05 are FANUC (6,367 applications), SIEMENS (5,963 applications) and FANUC (4,535 applications).

Source: EPO PATSTAT, worldwide filings