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HERBERT S SIMPSON

Overview
  • Total Patents
    59
About

HERBERT S SIMPSON has a total of 59 patent applications. Its first patent ever was published in 1902. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets machines, materials and metallurgy and measurement are SIMPSON AG MASCHINEN, NAT ENG CO and ROYER FOUNDRY AND MACHINE COMP.

Patent filings in countries

World map showing HERBERT S SIMPSONs patent filings in countries
# Country Total Patents
#1 United States 46
#2 Canada 11
#3 Germany 2

Patent filings per year

Chart showing HERBERT S SIMPSONs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Christensen Alfred C 24
#2 Granath Axel G 7
#3 Simpson Peter L 5
#4 Dvorak James J 4
#5 Simpson Bruce L 3
#6 Mcilvaine Robert L 3
#7 Walter Horth 3
#8 Barney Castor 3
#9 Horth Walter 2
#10 Rapp Axel G J 2

Latest patents

Publication Filing date Title
US2553318A Method of reclaiming sand
US2549603A Method of mulling material
US2576180A Mixer
US2591929A Conveyer trough
US2593327A Sand cooling device
US2531578A Material cooling device
US2515194A Method of and apparatus for sand recovery
US2530651A Sand recovery apparatus
US2471487A Mixer
US2457587A Material reclamation system
US2447575A Apparatus for aerating granular material
US2429667A Method of reclaiming spent material
US2485981A Method of and device for testing foundry sand
US2424272A Apparatus for removing fines in bucket loaders
US2413603A Mixer
US2433738A Apparatus for reclaiming spent foundry sand
US2456769A Method of reclaiming foundry sand
US2420392A Foundry sand reclaiming system and method
US2314486A Apparatus for cooling sand mullers
US2377307A Mixer with pressure controlled mullers