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HOGG ROBERTSON JOHN

Overview
  • Total Patents
    16
About

HOGG ROBERTSON JOHN has a total of 16 patent applications. Its first patent ever was published in 1928. It filed its patents most often in United States. Its main competitors in its focus markets mechanical elements, machines and control are THOMAS B JEFFERY, DOORNE S AUTOMOBIELFABRIEK N V and HALE JESSE W.

Patent filings in countries

World map showing HOGG ROBERTSON JOHNs patent filings in countries
# Country Total Patents
#1 United States 16

Patent filings per year

Chart showing HOGG ROBERTSON JOHNs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hogg Robertson John 16
#2 Leonard Gutteridge 2
#3 Horace Howard Lionel 1
#4 Robertson Jr John 1

Latest patents

Publication Filing date Title
US2321940A Heating system
US2105267A Charge cooler
US2092358A Tubular joint
US1916533A Variable speed friction gearing
US1990614A Variable speed friction gearing
US1810401A Governor
US1813957A Variable friction gearing
US1823125A Variable speed friction gearing
US1850158A Variable friction gearing
US1810059A Centrifugal governor mechanism
US1780540A Governor mechanism
US1879508A Variable friction gearing
US1772593A Friction gearing
US1785285A Centrifugal governor