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PITTSBURGH STEEL CO

Overview
  • Total Patents
    137
About

PITTSBURGH STEEL CO has a total of 137 patent applications. Its first patent ever was published in 1912. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets machine tools, civil engineering and machines are KEYSTONE STEEL & WIRE CO, EVG ENTWICKLUNG VERWERT GES and BARDEN WAYNE.

Patent filings in countries

World map showing PITTSBURGH STEEL COs patent filings in countries
# Country Total Patents
#1 United States 90
#2 Canada 22
#3 United Kingdom 12
#4 France 5
#5 Germany 3
#6 Austria 2
#7 Belgium 2
#8 Spain 1

Patent filings per year

Chart showing PITTSBURGH STEEL COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Protin Edward J 10
#2 Benedict Edward L 10
#3 Johnson August G 9
#4 Bull George E 8
#5 Edge Walter S 8
#6 Roehl Edward J 7
#7 Mcnabb Arthur E 5
#8 Hunter Everett C 5
#9 Benedict Edward Lambertson 4
#10 Michel Emory B 4

Latest patents

Publication Filing date Title
US3531097A Oxygen lance
US3420754A Electroplating a ductile zinc-nickel alloy onto strip steel
US3152458A Oil well drilling string
US3163058A Apparatus for continuously drawing, knurling and coiling travelling wire
GB941242A Method of making clad steel
US3077131A Die rolling apparatus for knurling wire
US3048203A Manufacture of folding concretereinforcing wire mats
GB917970A Integral lightweight drill pipe and method for making same
US3002238A Ingot mold sideboard hanger
US3034211A Method of making clad steel
US3076260A Strip and method for manufacturing bundy tubing and method of making the same
US2942999A Laboratory test for determining brazeability of copper-plated steel strip
US2926518A Reinforcement and form sheets for concrete
US2796168A Wire-feeding mechanism for nail-making machine
US3010258A Reinforcement fabric for concrete structures
US2731403A Manufacture of nickel-plated steel
US2724142A Gate closer
US2767411A Nail making machine
US2903880A Reinforcement fabric for concrete structures
US2684937A Brass plating