Title:
Combination oil well derrick and tilting construction boom
United States Patent 2889898


Inventors:
Woolslayer, Homer J.
Iddings, Charles D.
Application Number:
US66556557A
Publication Date:
06/09/1959
Filing Date:
06/13/1957
Assignee:
MOORE CORP LEE C
Primary Class:
Other Classes:
212/262
International Classes:
B66C23/52; E21B15/02
View Patent Images:
US Patent References:
2781108Self-erecting derrick1957-02-12
2780326Oil well mast gin pole1957-02-05
2345253Portable derrick1944-03-28
2168837Oil well rig1939-08-08