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HOFFMANN ELEKTROKOHLE

Overview
  • Total Patents
    43
About

HOFFMANN ELEKTROKOHLE has a total of 43 patent applications. Its first patent ever was published in 1973. It filed its patents most often in Germany, EPO (European Patent Office) and United States. Its main competitors in its focus markets transport, electrical machinery and energy and machines are MAX FROST, MERSEN FRANCE AMIENS SAS and TEIKOKU CARBON IND.

Patent filings per year

Chart showing HOFFMANN ELEKTROKOHLEs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hoell Johann 19
#2 Hoffmann Peter 18
#3 Reiser Klaus 13
#4 Grabner Herbert 12
#5 Siessl Wolfgang 4
#6 Bartels Sven 3
#7 Rastl Hans 3
#8 Hoell Johann Ing 3
#9 Grabner Herbert Ing 3
#10 Pilz Werner 2

Latest patents

Publication Filing date Title
DE19856809A1 Process for impregnating porous workpieces
DE19856390A1 Electric motor noise suppression module e.g. for automobile electric fuel pump, has noise suppression circuit connected between input and output terminals supported by housing enclosing noise suppression circuit
DE19529169A1 Contact strip for pantographs
DE19522329A1 Brush-holder for electric motors e.g. commutator motors
DE4336705A1 Sliding contact element and method for connecting an electrical connecting conductor to a sliding contact element
DE4234497A1 Method for producing grinding wheels for electrical collectors or the like
US5285126A Collector shoe and method for producing it
US5189903A Sliding strip for collector with rupture detection device
EP0415969A1 Contact bolt for switches, switching relays and the like
DE3914675A1 GRINDING PIECE FOR CURRENT COLLECTORS
DE3821254A1 GRINDING PIECE FOR CURRENT COLLECTORS AND METHOD FOR THEIR PRODUCTION
DE3821255A1 GRINDING PIECE FOR CURRENT COLLECTORS AND METHOD FOR THEIR PRODUCTION
DE3821253A1 COAL STRIP FOR CURRENT COLLECTORS
DE3736535A1 GRINDING CONTACT ARRANGEMENT, ESPECIALLY FOR A CARBON BRUSH
EP0234427A2 Two-component carbon brush
DE3148996A1 CARBON BRUSH FOR ELECTRICAL MACHINES
DE2701829A1 PRESSED CARBON BRUSH WITH AT LEAST ONE PRESSED-IN CABLE