Learn more

CROWELL ERD V

Overview
  • Total Patents
    43
About

CROWELL ERD V has a total of 43 patent applications. Its first patent ever was published in 1919. It filed its patents most often in United States and Canada. Its main competitors in its focus markets civil engineering, machines and environmental technology are DRILEX LTD, DYNAMIC TUBULAR SYSTEMS INC and DAILEY OIL TOOLS INC.

Patent filings in countries

World map showing CROWELL ERD Vs patent filings in countries
# Country Total Patents
#1 United States 42
#2 Canada 1

Patent filings per year

Chart showing CROWELL ERD Vs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Crowell Erd V 43
#2 Guiberson Samuel A Jr 1
#3 Whiteman Hawkins 1

Latest patents

Publication Filing date Title
US2223442A Apparatus and method for cementing wells
US2397473A Means for testing formations in wells
US2161284A Apparatus for cementing wells
US2397472A Oil well device
US2161282A Apparatus for cementing wells
US2161283A Apparatus for cementing wells
US2177172A Apparatus for cementing wells
US2071392A Apparatus for cementing wells
US2071391A Apparatus for cementing wells
US2071390A Apparatus for cementing wells
US2120694A Apparatus for oil well cementing
US2053065A Tubing anchor
US2071389A Well cementing
US1866087A Tubing anchor
US1896482A Cement retainer
US1856469A Tubing support
US1983523A Swab
US1817067A Drill stem
US1828100A Method of cementing wells
US1798523A Drive mechanism for rotary drill pipe