United States Patent 2768386
Inventors:
Graef, Charles G.
Gordon, Deckman
Simpson, Edward H.
Publication Date:
10/30/1956
Assignee:
O & M MACHINE COMPANY INC
Other Classes:
4/111.500, 110/240, 110/258, 4/320, 4/111.600, 417/40
International Classes:
A47K11/02; A47K11/00