Title:
Sign and its supports
United States Patent 1422502


Inventors:
Wark, William J.
Application Number:
US50008621A
Publication Date:
07/11/1922
Filing Date:
09/12/1921
Assignee:
Wark, William J.
Primary Class:
Other Classes:
248/291.1
International Classes:
G09F21/04
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