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STEEL ENG CO LTD

Overview
  • Total Patents
    77
About

STEEL ENG CO LTD has a total of 77 patent applications. Its first patent ever was published in 1970. It filed its patents most often in South Africa, Canada and United States. Its main competitors in its focus markets civil engineering, machine tools and engines, pumps and turbines are AZUKO PTY LTD, PATTERSON WILLIAM N and KLEMM BOHRTECH.

Patent filings in countries

World map showing STEEL ENG CO LTDs patent filings in countries

Patent filings per year

Chart showing STEEL ENG CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Wallace Trevor E 17
#2 Wallace T 16
#3 Hunt Clive Wilfred 10
#4 Hedges Raymond 8
#5 Seawright R 8
#6 Hunt Clive W 5
#7 Wallace Trevor Evelyn 3
#8 James Brian Harry 3
#9 Foster Bruce Allen 3
#10 Foster Bruce Allen George Edwa 3

Latest patents

Publication Filing date Title
ZA9301825B Rockdrill airleg
ZA9105734B Hydraulic percussive drills
ZA8702838B Hydraulically powered rotary percussive machines
AU7185087A Hydraulically powered rotary percussive machines
ZA8607778B Apparatus for dislodging a drill string from a drill hole
AU5491886A Hydraulic percusive machine
ZA8601965B Hydraulic percussive machines
ZA8506786B Hydraulic drilling machines
ZA8300835B A wheel and a tread-forming shoe therefor
ZA7807290B Hydraulic percussive machines
CA1036589A Valves for use on a telescopic rock drill mounting
ZA7701338B Hydraulic percussive machines
ZA7603344B Hydraulic rotary-percussive machines
ZA7602125B Hydraulic reciprocating machines
ZA7601651B Rock drilling rigs
ZA7601650B Hydraulic percussive machines
ZA7601652B Hydraulic percussive machines
ZA7601547B Drilling booms
US4000873A Mounting for rock drills
US4066135A Telescopic rock drill mounting