United States Patent 2813698
Inventors:
Lincoln, Roland L.
Publication Date:
11/19/1957
Assignee:
Lincoln, Roland L.
Other Classes:
165/274, 165/90, 165/89, 165/287, 165/181, 165/104.270, 165/101, 165/134.100, 165/104.250, 219/469
International Classes:
F28D15/02