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.
# | 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 |
# | Industry | |
---|---|---|
#1 | Machine tools | |
#2 | Machines | |
#3 | Materials and metallurgy | |
#4 | Agriculture |
# | Technology | |
---|---|---|
#1 | Hand-held cutting tools | |
#2 | Grinding or polishing devices | |
#3 | Unspecified technologies | |
#4 | Metal tempering | |
#5 | Unspecified technologies | |
#6 | Animal care | |
#7 | Punching metal |
# | 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 |
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. |