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WARREN AUTOMATIC TOOL CO

Overview
  • Total Patents
    17
About

WARREN AUTOMATIC TOOL CO has a total of 17 patent applications. Its first patent ever was published in 1967. It filed its patents most often in United States, Canada and France. Its main competitors in its focus markets civil engineering, machines and measurement are MERLA TOOL CORP, MCMURRY OIL TOOLS INC and BRADFORD THOMAS.

Patent filings in countries

World map showing WARREN AUTOMATIC TOOL COs patent filings in countries
# Country Total Patents
#1 United States 12
#2 Canada 1
#3 France 1
#4 United Kingdom 1
#5 Netherlands 1
#6 Norway 1

Patent filings per year

Chart showing WARREN AUTOMATIC TOOL COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Dower Ethell J 11
#2 Dower E 2
#3 Dower E J 1

Latest patents

Publication Filing date Title
US4099536A Method and apparatus for controlling a surging flow in a closed conduit
US3994176A Pneumatic apparatus for measuring rate of movement
US3994166A Apparatus for eliminating differential pressure surges
US4000645A Apparatus for pneumatically monitoring conditions of a well circulating system
US3857281A Method and apparatus for detecting potentially dangerous conditions in a well bore during trips of the well string in and out of the well bore
US3750480A Pneumatic measurement apparatus
US3595075A Method and apparatus for sensing downhole well conditions in a wellbore
US3646607A Apparatus for controlling fluid flow through a conduit
US3566699A Apparatus for measuring liquid density
US3479001A Closure member and apparatus for controlling fluid flow through a conduit
US3470972A Bottom-hole pressure regulation apparatus
US3470971A Apparatus and method for automatically controlling fluid pressure in a well bore