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DUFF NORTON CO

Overview
  • Total Patents
    97
About

DUFF NORTON CO has a total of 97 patent applications. Its first patent ever was published in 1952. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets packaging and shipping, mechanical elements and machines are VARIABLE KINETIC DRIVES LTD, HALE JESSE W and JIAN XUE QIN.

Patent filings per year

Chart showing DUFF NORTON COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Charles Carroll 13
#2 Carroll Charles 12
#3 Profet Anthony G 8
#4 Dixon John J 7
#5 Ferguson George R 5
#6 Beck Robert J 5
#7 Lucas James C 3
#8 Mcmullen Carroll J 3
#9 Christensen John D 2
#10 Nestvogel Dieter K 2

Latest patents

Publication Filing date Title
WO9422760A1 Hoist drum braking system
US4735262A Rotary steam joint
US4691452A Articulable siphon tube assembly for dryer drum
US4556832A Control valve apparatus
US4500069A Hydraulic directional control valve
US4477107A Rotating joint with separated bearings and seals
US4392390A Shielding apparatus for linear actuator
US4014467A Dishwasher and coupling
US4000664A Mechanical actuator
US3957144A Continuous roller brake
US3912046A Fluid device with back pressure valve arrangement
US3889983A Rotary fluid joint
US3873066A Self-contained mechanical actuator
CA949548A Ratchet lever drum puller
US3707885A Hoist handle
US3704765A Overload clutch
US3672637A Ratchet lever drum puller
US3559499A Self-contained mechanical actuator
US3587796A Self-locking transmission mechanism
US3485110A Nut and screw mechanism