Learn more

DOUBLE A PRODUCTS COMPANY

Overview
  • Total Patents
    17
About

DOUBLE A PRODUCTS COMPANY has a total of 17 patent applications. Its first patent ever was published in 1956. It filed its patents most often in United States and Canada. Its main competitors in its focus markets machines, mechanical elements and electrical machinery and energy are DOUBLE A PROD CO, LUDWIG WALTER D and STI SRL.

Patent filings in countries

World map showing DOUBLE A PRODUCTS COMPANYs patent filings in countries
# Country Total Patents
#1 United States 16
#2 Canada 1

Patent filings per year

Chart showing DOUBLE A PRODUCTS COMPANYs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Loup Ronald L 7
#2 Pippenger John J 4
#3 Day Curtis H 2
#4 Walker Samuel C 2
#5 Teichert Rainer 2
#6 Newman Sr Herbert A 1
#7 Carlson Allen J 1
#8 Vander Kaay Henry A 1
#9 Olmsted Peter B 1
#10 Johnson Charles E 1

Latest patents

Publication Filing date Title
US4412196A Solenoid for directional valves
US4406307A Directional valve with spool transfer loop
US4418720A Solenoid operated directional valves having modular construction
US4375226A Valve body for solenoid operated directional valve
US4293284A Power limiting control apparatus for pressure-flow compensated variable displacement pump assemblies
US4114637A Variable differential pressure unloading valve apparatus
US3903923A Stabilized relief valve
US3026856A Valve controlling mechanism
US3036433A Hydraulic power unit
US3040768A Oscillating valve
US3106897A Fixed displacement variable discharge pump
US3011533A Combination power tool with adjustable tool spindle
US3018796A Valve port arrangement
US3022794A Pressure reducing valve
US2891516A Selector valve for controlling the direction and speed of movement of an associated fluid motor
US2961001A Pilot controlled valve