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.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 12 |
# | Industry | |
---|---|---|
#1 | Civil engineering | |
#2 | Mechanical elements | |
#3 | Machines | |
#4 | Basic materials chemistry |
# | Technology | |
---|---|---|
#1 | Earth drilling | |
#2 | Unspecified technologies | |
#3 | Clutches and brakes | |
#4 | Nails | |
#5 | Lubricating compositions | |
#6 | Pipes |
# | Name | Total Patents |
---|---|---|
#1 | Double Edward | 12 |
#2 | Craig Allen | 1 |
#3 | Karten Frank J | 1 |
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. |