Escape for derricks
United States Patent 1571096

Inventors:
Garland, Rambin Louis
Alfred, Rambin William
Publication Date:
01/26/1926
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Assignee:
Louis, Garland Rambin
Primary Class:
182/11
Other Classes:
105/151, 187/245, 104/113
International Classes:
A62B1/14; A62B1/00