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DEFIANCE MACHINE WORKS INC

Overview
  • Total Patents
    14
About

DEFIANCE MACHINE WORKS INC has a total of 14 patent applications. Its first patent ever was published in 1941. It filed its patents most often in United States and United Kingdom. Its main competitors in its focus markets machine tools and machines are INGERSOLL MILLING MACHINE CO, CONS MACHINE TOOL CORP and LEAVITT MACHINE CO.

Patent filings in countries

World map showing DEFIANCE MACHINE WORKS INCs patent filings in countries
# Country Total Patents
#1 United States 8
#2 United Kingdom 6

Patent filings per year

Chart showing DEFIANCE MACHINE WORKS INCs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Machine tools
#2 Machines

Top inventors

# Name Total Patents
#1 Colwell Lester V 3
#2 Jay Snyder Willis 2
#3 Hall Keith W 1
#4 Carl Kinker Clarence 1
#5 Hummer Ralph G 1

Latest patents

Publication Filing date Title
US2482346A Pressure release mechanism
GB615493A Improvements in rotary metal cutting tools
GB625427A Hydraulically operated transfer molding presses
US2458995A Cutter tool vibration control
US2482338A Molding press
GB589928A Improvements in or relating to rotary cutters
GB588473A Improvements relating to rotary or milling cutters
US2432383A Machine tool rotary spindle stabilizer
US2430844A Rotary cutting tool
US2430843A Machine tool spindle
US2315877A Machine tool
US2346141A Hydraulic press control