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SHEFFIELD CORP

Overview
  • Total Patents
    566
About

SHEFFIELD CORP has a total of 566 patent applications. Its first patent ever was published in 1937. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets measurement, machines and machine tools are SHEFFIELD GAGE CORP, FED PRODUCTS CORP and PISTOLES LAMBERT R.

Patent filings in countries

World map showing SHEFFIELD CORPs patent filings in countries
# Country Total Patents
#1 United States 239
#2 Canada 146
#3 United Kingdom 113
#4 France 46
#5 Switzerland 13
#6 Germany 9

Patent filings per year

Chart showing SHEFFIELD CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Fay Aller Willis 96
#2 Aller Willis Fay 45
#3 Polk Louis F 28
#4 Aller Willis F 28
#5 Esken Robert L 26
#6 Straw Jesse H 19
#7 Mahlmeister Raymond A 18
#8 Byrkett Elwood L 18
#9 Roney Richard N 17
#10 Baker Ralph C 13

Latest patents

Publication Filing date Title
US3289464A Pneumatic gaging apparatus
US3355955A Positioning device
US3312134A Cutting device with vibrating cutter anvil
US3336090A Machine assembly
GB1090463A Indicating apparatus for use in pneumatic gauging circuits
GB1080006A Cleaning grinding wheels
US3250067A Fluid apparatus
GB1088321A Fluid bearing
US3372333A Differential capacitor transducer apparatus having coarse and fine adjustments and means for changing scale span
US3258118A Fluid apparatus
GB1020960A Electronic measuring apparatus with minimized quadrature components
US3286410A Forming method and apparatus
US3335737A Fluid apparatus
GB1001395A Electrical transducer
US3197873A Gaging device
US3247621A Machine assembly
US3266854A Machine system
US3273378A Gaging device
GB986787A Method of making flanged wheels
US3270423A Positioning device