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DRUMMOND ROBERT S

Overview
  • Total Patents
    30
About

DRUMMOND ROBERT S has a total of 30 patent applications. Its first patent ever was published in 1914. It filed its patents most often in United States and Canada. Its main competitors in its focus markets machine tools, machines and civil engineering are GLEASON PFAUTER MASCHINENFABRI, SUNDERLAND SAM and FELLOWS GEAR SHAPER CO.

Patent filings in countries

World map showing DRUMMOND ROBERT Ss patent filings in countries
# Country Total Patents
#1 United States 26
#2 Canada 4

Patent filings per year

Chart showing DRUMMOND ROBERT Ss patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Machine tools
#2 Machines
#3 Civil engineering

Top inventors

# Name Total Patents
#1 Drummond Robert S 30

Latest patents

Publication Filing date Title
US2325836A Gear crowning
US2347998A Gear crowning
US2319117A Gear crowning
US2347997A Method of gear finishing
US2380224A Herringbone gear finishing
US2311037A Gear finishing
US2354670A Gear finishing
US2322793A Gear finishing tool
US2298471A Gear finishing
US2350882A Gear crowning machine
US2168932A Gear-cutting machine
US2214225A Apparatus for finishing gears
US2277041A Apparatus for crowning internal gears
US2227491A Machine for cutting gears
US2270831A Gear finishing machine
US2169632A Method of making rotary gear cutters
US2270422A Method of cutting gears
US2157981A Machine for cutting gears
US2126178A Rotary gear cutting tool
US2111045A Lapping machine