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HALL ROBERT F

Overview
  • Total Patents
    20
About

HALL ROBERT F has a total of 20 patent applications. Its first patent ever was published in 1922. It filed its patents most often in Canada, United States and United Kingdom. Its main competitors in its focus markets transport, engines, pumps and turbines and machines are SHANNON ELLWOOD M, BRUCE ALFRED W and WOODARD WILLIAM E.

Patent filings in countries

World map showing HALL ROBERT Fs patent filings in countries
# Country Total Patents
#1 Canada 9
#2 United States 9
#3 United Kingdom 2

Patent filings per year

Chart showing HALL ROBERT Fs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Hall Robert F 18

Latest patents

Publication Filing date Title
GB9226738D0 Filter apparatus
GB8928362D0 Filter apparatus for the batch filtration of viscous liquids and pastes
US2212599A Glass cutting appliance
US1782093A Truck for railway rolling stock
US1736881A Locomotive
US1533245A Truck for railroad rolling stock
US1512463A Swing-hanger link for railroad trucks
US1557932A Railroad draft appliance
US1477952A Locomotive
US1464931A Locomotive
US1485982A Truck for railroad rolling stock
CA249492A Car truck
CA238017A Locomotive
CA241926A Truck for railroad rolling stock
CA238825A Locomotive
CA254735A Railroad draft appliance
CA240363A Railway truck
CA244496A Swing hanger link for railroad trucks
CA240362A Railway truck
CA312277A Truck for railway rolling stock