United States Patent 2074085
Inventors:
Frantz, Samuel G.
Publication Date:
03/16/1937
Assignee:
Frantz, Samuel G.
Other Classes:
209/222, 209/232, 209/215, 210/119, 209/38, 209/218, 210/785, 210/534, 210/223, 210/111
International Classes:
B03C1/025; B03C1/02