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GRESEN MANUFACTURING CO

Overview
  • Total Patents
    30
About

GRESEN MANUFACTURING CO has a total of 30 patent applications. Its first patent ever was published in 1966. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets mechanical elements, electrical machinery and energy and engines, pumps and turbines are IMI NORGREN HERION FLUIDTRONIC GMBH & CO KG, SHOKETSU KINZOKU KOGYO KK and BUCHER HYDRAULICS GMBH.

Patent filings in countries

World map showing GRESEN MANUFACTURING COs patent filings in countries
# Country Total Patents
#1 United States 10
#2 Canada 5
#3 Germany 3
#4 Sweden 3
#5 France 2
#6 United Kingdom 2
#7 Argentina 1
#8 Australia 1
#9 Brazil 1
#10 Japan 1
#11 South Africa 1

Patent filings per year

Chart showing GRESEN MANUFACTURING COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Stephens William T 9
#2 Determan Roger G 3
#3 Stephens W 2
#4 Ohnesorge Ralph R 1
#5 Merilatt Clyde D 1
#6 Getman Ronald K 1
#7 Straight Dwaine D 1
#8 Joseph Huber Mortimer 1
#9 Determan R G 1
#10 Rojiyaa Jii Deitaaman 1

Latest patents

Publication Filing date Title
US4310143A Electrically controlled proportional valve
DE2947535A1 ELECTRICALLY ACTUATED PROPORTIONAL VALVE
US4253482A Hydraulic valve having pressure compensated demand flow
US4129987A Hydraulic control system
US4075933A Hydraulic pump or motor
US3849034A Orbital device
US4025243A Orbital device
CA966037A Hydraulic valve having pressure compensated demand flow
US3901264A Adjustable flow control for hydraulic valves having high pressure main supply and controls fluid flow to cylinder and exhaust ports
US3502109A Quick response pilot operated valve
US3469606A Multi-port rotary and reciprocating fluid control valve
US3502108A Pilot operated valve