SAFE LOAD INDICATORS FOR JIB CRANES
United States Patent 3490015

Inventors:
Nixon, Brian George
Publication Date:
01/13/1970
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Assignee:
WEIGHLOAD LTD
Primary Class:
340/522
Other Classes:
182/18, 116/300, 340/685
International Classes:
B66C23/90; B66C23/00; G08B21/00




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