Collapsible jack
United States Patent 3197179
US Patent References:
/0988948.html
- - 0988948

/1226444.html
- - 1226444

Brake retainer
- - 1721227

Telescopic and adjustable building support
- - 2504291

Adjustable post
- - 2548844


Inventors:
Arnes, Lyle L.
Buhro, Charles L.
Publication Date:
07/27/1965
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Assignee:
WALKER MFG CO
Primary Class:
254/101
Other Classes:
248/354.300
International Classes:
E21D11/40; E21D15/24; E21D15/00