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.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 42 | |
#2 | Canada | 19 | |
#3 | United Kingdom | 11 | |
#4 | Germany | 8 | |
#5 | France | 8 | |
#6 | Australia | 2 | |
#7 | Belgium | 2 | |
#8 | Switzerland | 1 | |
#9 | EPO (European Patent Office) | 1 | |
#10 | Italy | 1 | |
#11 | Japan | 1 | |
#12 | WIPO (World Intellectual Property Organization) | 1 |
# | Industry | |
---|---|---|
#1 | Packaging and shipping | |
#2 | Mechanical elements | |
#3 | Machines | |
#4 | Electrical machinery and energy | |
#5 | Thermal processes |
# | Technology | |
---|---|---|
#1 | Unspecified technologies | |
#2 | Gearing | |
#3 | Winches | |
#4 | Lifting and pushing | |
#5 | Unspecified technologies | |
#6 | Clutches and brakes | |
#7 | Electric switches | |
#8 | Nails | |
#9 | Shafts | |
#10 | Heat-exchanger without contact |
# | 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 |
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 |