Title:
Reinforced structural element
United States Patent 2324916
Inventors:
Duncan, James K.
Phelps, George L.
Publication Date:
07/20/1943
Assignee:
UNITED STATES GYPSUM CO
Other Classes:
428/157, 52/592.100, 52/670, 52/612, 52/600
International Classes:
E04C2/04