Title:
Posthole boring machine
United States Patent 2665116
US Patent References:
/1238388.html
- - 1238388

Fluid-pressure jack
- - 1548559

Pole setting apparatus
- - 1921812

Earth drill
- - 2410959

Earth auger
- - 2415572


Inventors:
Frank, Brink
Star, John E.
Publication Date:
01/05/1954
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Assignee:
Frank, Brink
Star, John E.
Primary Class:
173/40
Other Classes:
173/150, 173/56, 173/187, 173/154
International Classes:
E21B7/02
US Patent References:
2418601Earth drill
2421970Earth boring machine
2480537Posthole digger attachment for tractors
2587893Pipe chuck