Title:
Builder's tower
Document Type and Number:
United States Patent 2261013
Inventors:
Berby, Ola L.
Plaque It!
Sponsored by: Flash of Genius |
Publication Date:
10/28/1941
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Referenced by:
Export Citation:
Assignee:
CLYDE IRON WORKS
Primary Class:
Other Classes:
187/900, 52/116
International Classes:
E04H12/18; E04H12/00