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JOHNSTON MORDICA O

Overview
  • Total Patents
    13
About

JOHNSTON MORDICA O has a total of 13 patent applications. Its first patent ever was published in 1934. It filed its patents most often in United States. Its main competitors in its focus markets civil engineering and machines are VALLOUREC DRILLING PRODUCTS USA INC, DAILEY OIL TOOLS INC and HOMCO INTERNATIONAL INC.

Patent filings in countries

World map showing JOHNSTON MORDICA Os patent filings in countries
# Country Total Patents
#1 United States 13

Patent filings per year

Chart showing JOHNSTON MORDICA Os patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Civil engineering
#2 Machines

Focus technologies

# Technology
#1 Earth drilling
#2 Unspecified technologies

Top inventors

# Name Total Patents
#1 Johnston Mordica O 13
#2 Andrew Thomas A 1
#3 Graham Adelbert M 1
#4 Smith Walter G L 1

Latest patents

Publication Filing date Title
US2667927A Valve for well testing tools
US2671509A Well testing apparatus
US2407081A Gun perforator for well casing
US2390372A Open hole sleeve packer
US2337752A Means of testing wells
US2222846A Well packer
US2190989A Method of preparing an oil well for production
US2176766A Pressure bomb mounting
US2129216A Equalizing valve
US2093129A Packer
US2126641A Main valve for well testing tools
US2132072A Formation tester
US2073107A Well testing method and apparatus therefor