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DOUBLE EDWARD

Overview
  • Total Patents
    12
About

DOUBLE EDWARD has a total of 12 patent applications. Its first patent ever was published in 1901. It filed its patents most often in United States. Its main competitors in its focus markets civil engineering, mechanical elements and machines are SALVESEN DRILLING SERVICES, EARTH TOOL CORP and MOSING DONALD E.

Patent filings in countries

World map showing DOUBLE EDWARDs patent filings in countries
# Country Total Patents
#1 United States 12

Patent filings per year

Chart showing DOUBLE EDWARDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Double Edward 12
#2 Craig Allen 1
#3 Karten Frank J 1

Latest patents

Publication Filing date Title
US1210615A Oil-tight swivel.
US1182533A Rotary bit.
US1224287A Rotary bit.
US1014955A Apparatus for elevating casings.
US862317A Underreamer.
US820101A Underreamer.
US808199A Ratchet-swivel rope-socket.
US796197A Underreamer.
US748054A Underreamer.
US727759A Wire-rope socket for well-drilling tools.
US734833A Underreamer.
US1143257A Combined rotary drilling nut and slips.