Log-handling derrick
United States Patent 2558306
US Patent References:
/0196378.html
- - 0196378

Lifting mechanism
- - 1649574

Excavator
- - 2196649

Transfer derrick
- - 2213540


Inventors:
Mcintyre, Sidney S.
Publication Date:
06/26/1951
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Assignee:
Mcintyre, Sidney S.
Primary Class:
212/298
International Classes:
B66C23/36; B66C23/00