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US HOFFMAN MACHINERY CORP

Overview
  • Total Patents
    261
About

US HOFFMAN MACHINERY CORP has a total of 261 patent applications. Its first patent ever was published in 1920. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets consumer goods, machines and chemical engineering are PROSPERITY CO INC, WM CISSELL MFG COMPANY and AMERICAN LAUNDRY MACH CO.

Patent filings in countries

World map showing US HOFFMAN MACHINERY CORPs patent filings in countries
# Country Total Patents
#1 United States 129
#2 Canada 37
#3 United Kingdom 34
#4 France 20
#5 Ireland 13
#6 Germany 10
#7 Switzerland 9
#8 Austria 5
#9 Denmark 4

Patent filings per year

Chart showing US HOFFMAN MACHINERY CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 William Strobridge 22
#2 Meyer Henry C A 14
#3 Clarke Clarence M 11
#4 Sutton Harry G 11
#5 Strobridge William 8
#6 Armstrong Francis J 8
#7 Card John L 7
#8 Machinery Corporation United S 7
#9 Locke Sanford J 7
#10 Ledbetter James C 6

Latest patents

Publication Filing date Title
US2898078A Valve structure
US2937713A Vacuum cleaner
US2983383A Liquid filter
US2822097A Centrifugal trickle valve
CH323885A Machine provided with a hollow rotating drum, the axis of which is disposed horizontally and comprising a device for the automatic balancing of the drum when the contents thereof are distributed so as to impart an unbalance to it
IE20818L Rotary apparatus for washing, drying, etc
DE1103878B Device for balancing the drum in washing machines and spin dryers
GB737072A Improvements in automatic balancing device for the rotating cylinders of centrifugal liquid extractors
FR1099443A Improvements to automatic balancing devices for rotating drums
CH318781A Washing and wringing machine including a rotating cylinder
IE20302L Rotary apparatus for washing, drying, etc
DE1080962B Device for balancing the drum in washing machines and spin dryers
FR1087271A Improvements made to the means for obtaining automatic balancing of horizontal rotating drums
US2717698A Automatic balancing device for rotating cylinders
GB715459A Improvements in automatic balancing of horizontal centrifugal extractors
US2687215A Automatic balancing of horizontal extractors
IE19998L Garment pressing machines
GB700563A Improvements in or relating to power mechanism for garment presses
GB687698A Improvements in or relating to centrifugal extraction
US2670847A Purification of fluids by means in a settling tank of magnetic separation