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Title:
Tower raising mechanism
United States Patent 2887191
Inventors:
Jack, Lovell
Publication Date:
05/19/1959
Export Citation:
Click for automatic bibliography generation
Assignee:
CHICAGO PNEUMATIC IND INC
Primary Class:
52/115
Other Classes:
14/36, 52/119
International Classes:
E04H12/18
;
E04H12/34
;
E21B15/00
;
E21D17/02
View Patent Images:
Download PDF 2887191
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Foreign References:
FR52541A