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HUGHES TOOL CO

Overview
  • Total Patents
    1,725
About

HUGHES TOOL CO has a total of 1,725 patent applications. Its first patent ever was published in 1915. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets civil engineering, machines and mechanical elements are THERESA J WILLIAMS, EVANS ROBERT F and REED EARL A.

Patent filings in countries

World map showing HUGHES TOOL COs patent filings in countries

Patent filings per year

Chart showing HUGHES TOOL COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Scott Floyd L 80
#2 Fletcher Harold W 52
#3 Galle Edward M 50
#4 Baugh John L 29
#5 Woods Henry B 26
#6 Cunningham Robert A 25
#7 Watkins Bruce J 25
#8 Ricker Norman H 22
#9 Scales Stanley R 22
#10 Seth Evans 21

Latest patents

Publication Filing date Title
US5360076A Dual metal face seal with single recessed energizer
EP0476352A1 Earth boring drill bit with improved wear inserts
US5129471A Earth boring bit with protected seal means
US5119714A Rotary rock bit with improved diamond filled compacts
US5173090A Rock bit compact and method of manufacture
US5159857A Fixed cutter bit with improved diamond filled compacts
US5015401A Bearings grease for rock bit bearings
US5128080A Method of forming diamond impregnated carbide via the in-situ conversion of dispersed graphite
CA2018779A1 Bearing grease for rock bit bearings
US4984643A Anti-balling earth boring bit
US5038640A Titanium carbide modified hardfacing for use on bearing surfaces of earth boring bits
US4941538A One-piece drill bit with improved gage design
US4911254A Polycrystalline diamond cutting element with mating recess
US4953641A Two cone bit with non-opposite cones
US4899838A Earth boring bit with convergent cutter bearing
US4884071A Wellbore tool with hall effect coupling
US4887675A Earth boring bit with pin mounted compensator
US4903786A Earth boring bit with improved two piece bearing and seal assembly
US4923020A Rock bit with rigid face seals and recessed energizers
US4866245A Method for manufacturing a rotary rock bit with improved weld root geometry