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DAVID BUTLER FRANK

Overview
  • Total Patents
    37
About

DAVID BUTLER FRANK has a total of 37 patent applications. Its first patent ever was published in 1924. It filed its patents most often in United States. Its main competitors in its focus markets engines, pumps and turbines, mechanical elements and machines are BRASELTON, WOOD ANDREW C and BELLEM LOUIS HENRI LIBERT.

Patent filings in countries

World map showing DAVID BUTLER FRANKs patent filings in countries
# Country Total Patents
#1 United States 37

Patent filings per year

Chart showing DAVID BUTLER FRANKs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 David Butler Frank 37

Latest patents

Publication Filing date Title
US3221575A Fluid pressure variable ratio reversible, combined hydrodynamical and multiply compounded planetary gearing driven transmission coupler, adaptable as forming a combined fluid torque convertor transmission coupler and rear traction-wheel-housing assembly, of and for an automotive vehicle
US2950707A Combined liquid fuel and excess air metering and distributing, combined liquid fuel and excess air atomizing and injecting, internal combustion engine
US2941360A Radial flow internal combustion turbine with air and fuel injection means
US2915876A Axially opposed dual row jet reaction turbine
US2876947A Multiple drive gear and pinion geared, multiple pressure stage compounded, elastic fluid compressor, applicable to a combustion turbine
US2799182A Pressure variable ratio combined hydrodynamical and compounded planetary transmission
US2775909A Combined hydrodynamical and compounded planetary gearing driven, internal fluid pressure axially oppositely actuated and controlled, dual flow type of variable reversible transmission coupler
US2746248A "t" shaped rotor type of, multiple group expansion, opposite dual flow pressure velocity compounded, combustion gas turbine motive power assembly
US2764040A Combined hydrodynamical and multicompounded planetary gearing driven, internal fluidpressure actuated and controlled, dual flow type of variable reversible transmissioncoupler
US2763166A Combined hydrodynamical and planetary gearing drive
US2687048A Internal fluid pressure variable combined hydrodynamical and planetary gearing driven transmission coupler applicable to a traction wheel of an automotive vehicle
US2667744A Internal-combustion turbine
US2680949A Internal-combustion turbine having rotating combustion chambers
US2747429A Internal fluid pressure variable, combined hydrodynamic and planetary gearing driven, reversible sun-gear type of transmission coupler
US2599893A Portable power saw mitering machine
US2573689A Internal-combustion engine variable combustion chamber
US2573688A Internal-combustion engine variable combustion chamber
US2506576A Variable and reversible rotary fluid power coupling
US2335258A Hydraulically operated vise assembly
US2323894A Valve