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DOUBLE A PROD CO

Overview
  • Total Patents
    28
About

DOUBLE A PROD CO has a total of 28 patent applications. Its first patent ever was published in 1962. It filed its patents most often in United States, Germany and Canada. Its main competitors in its focus markets machines, mechanical elements and electrical machinery and energy are DOUBLE A PRODUCTS COMPANY, LUDWIG WALTER D and GARDNER LAWRENCE H.

Patent filings in countries

World map showing DOUBLE A PROD COs patent filings in countries

Patent filings per year

Chart showing DOUBLE A PROD COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Loup Ronald L 10
#2 Loup Ronald Lamont 4
#3 Johnson Charles E 4
#4 Gill Arthur W 3
#5 Day Curtis H 2
#6 Day Curtis Houston 2
#7 Olmsted Peter B 1
#8 B Olmsted Peter 1
#9 Fisher Thomas N 1
#10 Walker Samuel Cawood 1

Latest patents

Publication Filing date Title
US4574843A Solenoid valve override cartridge
US4474104A Control system for variable displacement pumps and motors
US4353394A Solenoid operated directional valve with detent mechanism
US4308891A Terminal blocks and indicator for solenoid valves
US4185661A Solenoid operated directional valve with detent mechanism
US4194173A Solenoid construction
US4164342A Variable differential pressure unloading valve apparatus
US4170214A Hydraulic valve module
DE2509079A1 Valve for adjusting hydraulic flow - has mechanisms adjusted by tool externals introduced into valve body
US3847176A Tamper-proof control valve
US3613715A Fluid valve means
US3565108A Fluid valve
US3231790A Manual armature actuating means for a valve solenoid
US3129645A Electrically modulated fluid valve
CA903620A Fluid valve