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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Donovan; William J.
Address:
Franklin, PA
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
3937517 Protective canopy February 10, 1976
An underground mining apparatus and more particularly an underground mining apparatus having improved protective canopy means extending partially thereover.










 
 
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