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THOS FIRTH & JOHN BROWN LTD

Overview
  • Total Patents
    67
About

THOS FIRTH & JOHN BROWN LTD has a total of 67 patent applications. Its first patent ever was published in 1931. It filed its patents most often in Spain, France and United States. Its main competitors in its focus markets materials and metallurgy, surface technology and coating and machine tools are LUDLUM STEEL COMPANY, BOEHLER BLECHE GMBH and REM CRU TITANIUM INC.

Patent filings in countries

World map showing THOS FIRTH & JOHN BROWN LTDs patent filings in countries
# Country Total Patents
#1 Spain 20
#2 France 15
#3 United States 13
#4 Austria 11
#5 Germany 4
#6 United Kingdom 3
#7 Belgium 1

Patent filings per year

Chart showing THOS FIRTH & JOHN BROWN LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 William Kirkby Henry 4
#2 Herbert Hatfield William 4
#3 Charles Sykes 4
#4 James Everett Samuel 2
#5 Hardwick Donald 2
#6 Leonard Rotherham 1
#7 Gray Rpbert Mowbray Norris 1
#8 Shelley Walker William 1
#9 Kirkby Henry William 1
#10 Donald Hardwick 1

Latest patents

Publication Filing date Title
ES275466A1 Improvements in or relating to alloy steels
DE1269813B Eligible nickel-containing steel alloy and a method for heat treating the same
US3135600A Alloy steels
ES208789A1 Improvements relating to ferritic creep-resisting steels
ES208788A1 Improvements relating to ferritic alloys
US2737455A Ferritic creep-resisting steels
ES204914A1 Improvements relating to alloy steels for use at elevated temperatures
GB738979A Improvements relating to austenitic steels
US2769227A Welded joint between ferritic and austenitic steel members
US2556373A Alloy steels for use at elevated temperatures
DE842954C Heat-resistant austenitic steel with improved machinability
US2504453A Alloy steels for use at elevated temperatures
ES181248A1 A procedure for the obtaining of steel alloys resistant to high temperatures
ES174169A1 Improvements in sustained alloy steels
US2449023A Austentic alloy steels
US2377732A Apparatus for casting metal ingots
GB561955A Improvements in or relating to wheels
ES144933A1 Improvements in steel alloys.
US2141389A Alloy steel
ES144059A1 Perfections in the preparation of alloyed steel.