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DRO ENGINEERING COMPANY DI

Overview
  • Total Patents
    27
About

DRO ENGINEERING COMPANY DI has a total of 27 patent applications. Its first patent ever was published in 1961. It filed its patents most often in United States, United Kingdom and Canada. Its main competitors in its focus markets machine tools, machines and mechanical elements are RICHARD SEIFRIED, STANDUN and SCHOEN HANS.

Patent filings in countries

World map showing DRO ENGINEERING COMPANY DIs patent filings in countries
# Country Total Patents
#1 United States 13
#2 United Kingdom 9
#3 Canada 5

Patent filings per year

Chart showing DRO ENGINEERING COMPANY DIs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Williamson Floyd M 18
#2 Williamson Floyd Mitchell 7

Latest patents

Publication Filing date Title
GB1089163A Pierce unit and means for setting up the same
GB1135923A A press, particularly a hydraulic press for dies
GB1142121A Hydraulic control for dies in ram type presses
GB1088401A Metering valve
US3290034A Hydraulic control for die pads in presses
US3279780A Hydraulic cushion for dies
GB1031204A Hydraulic control for die pads in presses
GB1049115A Ram type press
US3244051A Pierce unit hydraulic control
US3268220A Hydraulic cushion for dies
US3205742A Adjustable pierce unit
US3238832A Pierce unit and means for setting up the same
US3264858A Hydraulic control for dies in ram type presses
US3231234A Metering valve
US3251214A Hydraulic system for dies
US3147962A Two-stage hydraulic cushions for dies
US3267715A Hydraulic control for dies in ram type presses
US3147723A Hydraulic control system for die pads in presses
US3147722A Die pads for ram type presses
CA724432A Hydraulic cushion for die pads in presses