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KREFFT W AG

Overview
  • Total Patents
    31
About

KREFFT W AG has a total of 31 patent applications. Its first patent ever was published in 1916. It filed its patents most often in Germany, France and Canada. Its main competitors in its focus markets thermal processes, electrical machinery and energy and furniture and games are WOLF APPLIANCE INC, ELECTROLUX AG and RHONE FONDERIES ATELIERS.

Patent filings in countries

World map showing KREFFT W AGs patent filings in countries
# Country Total Patents
#1 Germany 24
#2 France 3
#3 Canada 2
#4 Switzerland 1
#5 United States 1

Patent filings per year

Chart showing KREFFT W AGs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Sachse Kurt 4
#2 Schnee Erich 2
#3 Post Wolfgang 2
#4 Frege Johannes 2
#5 Mayer Rene Dipl-Ing 1
#6 Kurt Sachse 1
#7 Berg Friedrich Dipl-Ing 1
#8 Thomae Rudolf Dipl-Ing 1
#9 Duday Horst Dipl-Ing 1
#10 Ingwersen Dipl-Ing Johann 1

Latest patents

Publication Filing date Title
DE1178804B Electromagnetic ignition and safety device for gas devices with a camshaft
DE1151476B Electric solenoid valve for gas burner
US3111161A Safety system for gas burners
FR72930E Device for regulating the supply of gas to a burner for cooking appliances using all gases
DE1042212B Equipment on double doors of baking and roasting ovens, in particular baking and roasting ovens of kitchen stoves
DE1005655B Electric cooker with two hotplates
DE930451C Evaporator for refrigerators, especially for absorption refrigerators
DE858763C Protection against water shortage for dishwashers and other devices
DE888887C Electrolyte, especially for electrolytic capacitors
DE931114C Device for holding electrical switching elements on a base plate
DE925832C Rectifier circuit with anode rectification for negative modulation in television sets
DE893235C Resilient mounting of tube-shaped electrodes in discharge tubes, especially cathodes in Braun tubes
DE834111C Vertical tube absorber
DE831010C coffee machine
FR1025225A Ignition device for gas fireplaces or cookers
DE894381C Central ignition for gas stoves or the like.
DE906232C Mounting of electrical switching elements on a base plate, in particular capacitors
DE814621C Contact spring bushing with clamping screw fastening and associated mounting body
DE879981C Central ignition for gas stoves or the like.
DE935804C Process for the formation of a dielectric layer by forming aluminum electrodes, particularly those for electrolytic capacitors