United States Patent 3003815
Inventors:
Zinn, Wilbur O.
Publication Date:
10/10/1961
Assignee:
Zinn, Wilbur O.
Other Classes:
297/452.170, 297/3, 5/630, 5/652, 297/DIG.001, 297/452.110, 297/396, 5/633, 297/DIG.002
International Classes:
A47C20/02; A47C20/00