Title:
Control apparatus
United States Patent 2671136


Inventors:
Greenawalt, Frederick A.
Application Number:
US29170552A
Publication Date:
03/02/1954
Filing Date:
06/04/1952
Assignee:
RANCO INC
Primary Class:
Other Classes:
200/18, 200/283, 236/DIG.5, 337/309
International Classes:
G05D23/275
View Patent Images:
Other References:
None