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HANNAUER CAR RETARDER COMPANY

Overview
  • Total Patents
    22
About

HANNAUER CAR RETARDER COMPANY has a total of 22 patent applications. Its first patent ever was published in 1923. It filed its patents most often in United States, Canada and France. Its main competitors in its focus markets transport are WILISCH ERHART DR, TRACKSIDE SERVICES INC and CRAFT NOMINEES PTY LTD.

Patent filings in countries

World map showing HANNAUER CAR RETARDER COMPANYs patent filings in countries
# Country Total Patents
#1 United States 13
#2 Canada 5
#3 France 2
#4 Germany 1
#5 United Kingdom 1

Patent filings per year

Chart showing HANNAUER CAR RETARDER COMPANYs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Transport

Focus technologies

Top inventors

# Name Total Patents
#1 Wilcox Edgar M 11
#2 George Hannauer 6
#3 Hannauer George 5
#4 Ernst Frolich 3
#5 Ernst Wenzel Karl 3
#6 Wenzel Karl E 1

Latest patents

Publication Filing date Title
US1906349A Track brake
US1787818A Car retarder for railway switching yards
US1812691A Railway car retarder apparatus
US1906348A Track brake
US1906347A Track brake
US1690915A Apparatus for transmitting signs
US1782874A Track-brake mechanism
GB263930A Railway brake construction and control means therefor
US1635989A Fluid-pressure regulator
US1638631A Track-brake mechanism and control means therefor
US1751995A Track-brake arrangement and control means therefor
US1638630A Control mechanism for brakes
US1584031A Track-skate-placing device
US1612865A Track brake
CA283269A Brake mechanism
CA263015A Track skate placing device
CA320579A Railway track brake mechanism
CA291985A Track brake
CA290809A Track brake mechanism