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DURHAM DUPLEX RAZOR COMPANY

Overview
  • Total Patents
    46
About

DURHAM DUPLEX RAZOR COMPANY has a total of 46 patent applications. Its first patent ever was published in 1909. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets machine tools, machines and materials and metallurgy are ROBERT ERN, AUTO STROP PATENTS CORP and WALTER OSBERGHAUS.

Patent filings in countries

World map showing DURHAM DUPLEX RAZOR COMPANYs patent filings in countries
# Country Total Patents
#1 United States 27
#2 Canada 6
#3 United Kingdom 5
#4 Switzerland 3
#5 Austria 2
#6 France 2
#7 Germany 1

Patent filings per year

Chart showing DURHAM DUPLEX RAZOR COMPANYs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Sheehan Thomas C 17
#2 Drew John E 7
#3 Razor Company Durham Duplex 3
#4 Cornelius Sheehan Thomas 2
#5 Sheehan Thomas Cornelius 2
#6 Morehead Patterson 1
#7 Durham Thomas Claude 1
#8 Hueber Victor B 1
#9 Alvarado Fernando A 1
#10 Comlins Sheehan Thomas 1

Latest patents

Publication Filing date Title
US2204827A Razor
GB483536A Improvements in or relating to safety razor blades and safety razors
US2090786A Razor
US2169383A Razor blade and holder therefor
US2168447A Safety razor
US2118498A Safety razor
US1957065A Razor sheath
US1892256A Safety razor
US1838116A Method of making razor blades
US1848204A Blade feed for honing machines
US1824410A Heat treating razor blade strips
US1682462A Safety razor
GB194748A Improvements in and relating to the hollow grinding of razor blades
US1508727A Knife grinder
US1516832A Method of hollow grinding razor blades
US1425798A Apparatus for making hollow-ground razor blades
GB156031A Improvements in safety razors
US1363362A Safety-razor
US1266868A Razor-blade.
US1088183A Razor.