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QUADREX CORP

Overview
  • Total Patents
    57
About

QUADREX CORP has a total of 57 patent applications. Its first patent ever was published in 1930. It filed its patents most often in United States, United Kingdom and EPO (European Patent Office). Its main competitors in its focus markets furniture and games, machines and electrical machinery and energy are SENNE EDGAR P, AIR WAY ELECTRIC APPL CORP and ELECTRIC VACUUM CLEANER CO.

Patent filings in countries

World map showing QUADREX CORPs patent filings in countries

Patent filings per year

Chart showing QUADREX CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Ward Leathers 47
#2 Martin Archer J P 1
#3 Spalaris Constantine N 1
#4 Vollmer Regis 1

Latest patents

Publication Filing date Title
EP0130840A2 Alignment pin for guide tube assembly in nuclear power plant reactor vessel
US4353243A Flexible diaphragm controlled valve
US2375373A Strain relief for electric cords
US2333018A Vertical-axis canister-type vacuum cleaner
US2333017A Vacuum cleaner
US2290597A Vacuum-cleaner bag emptying device
US2304309A Vertical-axis canister-type vacuum cleaner
US2245989A Suction device for vacuum cleaners
US2192357A Vacuum cleaner
US2260325A Vacuum cleaner
US2286818A Vacuum cleaner nozzle
US2270318A Vacuum cleaner pneumatic annunciator
US2320368A Vacuum cleaner electric indicator
US2320367A Flexible hose and method of forming the same
US2266976A Vertical canister type vacuum cleaner
US2210724A Push-broom-type vacuum cleaner
US2122179A Agitator top for vacuum cleaner filters
GB474876A Improvements in or relating to vacuum cleaners
GB474875A Improvements in or relating to vacuum cleaners
GB474877A Improvements in or relating to vacuum cleaners