Reinforced-concrete wall structure
United States Patent 1343926

Inventors:
Madsen, Viggo J.
Publication Date:
06/22/1920
View Patent Images:
Download PDF 1343926 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Madsen, Viggo J.
Primary Class:
52/258
Other Classes:
52/780, 52/712
International Classes:
E04B2/56