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KARL HEFEL

Overview
  • Total Patents
    12
About

KARL HEFEL has a total of 12 patent applications. Its first patent ever was published in 1935. It filed its patents most often in United States, United Kingdom and Germany. Its main competitors in its focus markets transport, electrical machinery and energy and machines are LEGRAND JEAN, TRANSMISSION TECHNOLOGIES CORP and AUTOMATIC DRIVE AND TRANSMISSI.

Patent filings in countries

World map showing KARL HEFELs patent filings in countries
# Country Total Patents
#1 United States 6
#2 United Kingdom 5
#3 Germany 1

Patent filings per year

Chart showing KARL HEFELs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Karl Hefel 6
#2 Thuengen Hubert Freiherr Von 1
#3 Von Thungen Hubert Freiherr 1

Latest patents

Publication Filing date Title
GB992974A Improvements in and relating to fluid-pressure apparatus for automatically controlling a motor vehicle clutch
US3066776A Automatic clutch control systems for motor vehicles
GB912639A Improvements in and relating to fluid pressure apparatus for automatically controlling a motor vehicle clutch
US2588627A Control for diesel-electric drives
GB666065A Automatic regulating device for internal-combustion engines, in particular of motor vehicles
US2599387A Power transmission unit
US2319322A Control means for x-ray tubes
GB506739A Device for automatic ascertainment of the transmission ratio of a gear coupled to aninternal combustion engine
US2330581A Power transmission
GB461306A Electric transmission gearing
US2223210A Electric transmission gearing