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HYDRAULIC DEV CORP INC

Overview
  • Total Patents
    202
About

HYDRAULIC DEV CORP INC has a total of 202 patent applications. Its first patent ever was published in 1937. It filed its patents most often in United States, France and United Kingdom. Its main competitors in its focus markets machine tools, machines and mechanical elements are HPM DEV CORP, HYDRAULIC PRESS CORP INC and NANJING BLESSED HYDRAULIC MACHINERY CO LTD.

Patent filings in countries

World map showing HYDRAULIC DEV CORP INCs patent filings in countries
# Country Total Patents
#1 United States 199
#2 France 2
#3 United Kingdom 1

Patent filings per year

Chart showing HYDRAULIC DEV CORP INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Walter Ernst 59
#2 Tucker Warren R 44
#3 Flowers Paul E 22
#4 Muller Johan A 21
#5 Macmillin Howard F 15
#6 Waldie George A 14
#7 Lawyer Ira B 7
#8 Pocock Paul C 7
#9 Crosby Melvin A 7
#10 Shaw Victor S 6

Latest patents

Publication Filing date Title
US2449365A Apparatus for forging
US2417858A Control system for hydraulic presses
US2408312A Press control
US2511538A Rotary balancing valve
US2415603A Hydraulic constant speed control system for parallel-connected hydraulic motors
US2404559A Plastic slug forming and feeding mechanism
US2413401A Apparatus for feeding preforms to injection machines
US2408285A Feeding device for injection or extrusion machines
US2399404A Precision pressure measuring press
US2386989A Precision pull-bar testing apparatus
US2398318A Method and apparatus for plastic injection
US2408303A Control system
US2416860A Remote control for hydraulic systems
US2398227A Briquetting press
US2418532A Remote control
US2411971A Extrusion machine
US2386966A High-frequency electrostatic heating of plastics
US2432170A Fluid operated control circuit for hydraulic systems
US2368754A Relief valve
US2374630A Twin-cylinder constant speed hydraulic system