United States Patent 2611459
Inventors:
Hammitt, Andrew B.
Birum Jr., Herbert L.
Publication Date:
09/23/1952
Assignee:
Hammitt, Andrew B.
Birum Jr., Herbert L.
Other Classes:
52/277, 52/506.050, 52/550
International Classes:
E04D3/36; F16B13/08; F16B13/04