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FRIEDR WILH DAUM FA

Overview
  • Total Patents
    12
About

FRIEDR WILH DAUM FA has a total of 12 patent applications. Its first patent ever was published in 1933. It filed its patents most often in Germany. Its main competitors in its focus markets transport, electrical machinery and energy and mechanical elements are JOSEF FRYBA, VER EISENBAHN SIGNALWERKE GMBH and ALFRED MONARD.

Patent filings in countries

World map showing FRIEDR WILH DAUM FAs patent filings in countries
# Country Total Patents
#1 Germany 12

Patent filings per year

Chart showing FRIEDR WILH DAUM FAs patent filings per year from 1900 to 2020

Focus technologies

# Technology
#1 Guiding railway traffic
#2 Electric switches
#3 Pipes

Top inventors

# Name Total Patents
#1 Jr Friedrich Wilhelm Daum 5
#2 Jun Friedrich Wilhelm Daum 1
#3 Berghaus Gustav 1

Latest patents

Publication Filing date Title
DE709137C Contact device for rail current closers
DE703843C Rail current switch
DE686188C Contact device for rail current closers
DE682463C Contact device for rail current closers
DE717259C Mercury contact for track closer
DE741485C Rail current switch
DE715546C Contact device for line current closer
DE644518C Rail current switch
DE685447C Contact device for rail current closers
DE643402C Rail current switch
DE682462C Contact device for rail current closers
DE624858C Shut-off device for pipes