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JOHN ROBERTSON CO INC

Overview
  • Total Patents
    14
About

JOHN ROBERTSON CO INC has a total of 14 patent applications. Its first patent ever was published in 1926. It filed its patents most often in United States and United Kingdom. Its main competitors in its focus markets machine tools, machines and materials and metallurgy are BWE LTD, LIGHT METALS CORP and KERR WALLACE E.

Patent filings in countries

World map showing JOHN ROBERTSON CO INCs patent filings in countries
# Country Total Patents
#1 United States 13
#2 United Kingdom 1

Patent filings per year

Chart showing JOHN ROBERTSON CO INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Jacobson Conrad C 11
#2 James Schweder 3
#3 Botes Sven R 1
#4 Dollin Edgar N 1
#5 Robertson Norman A 1

Latest patents

Publication Filing date Title
US3088589A Method for continuous extrusion of metals
US2015111A Apparatus for extruding metals
GB420939A Improvements in and relating to apparatus for method of making metal sheaths for cables
US2025056A Cable sheath extrusion press
US1972684A Apparatus for extruding metals
US1972710A Self-charging cable sheath extrusion apparatus
US1972709A Weldless cable sheath extrusion apparatus
US1983761A Weldless die block for extrusion presses and method of extruding
US2045655A Apparatus for extruding metals
US1971187A Hydraulic reversing valve
US1877880A Die block
US1881278A Solder wire extrusion press
US1781168A Die-casting machine
US1743687A Ram for metal-extrusion presses