Ice breaking and rotary scarifier device
United States Patent 2197549

Inventors:
Hargrave, Fred M.
Maricle, Walter E.
Publication Date:
04/16/1940
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Assignee:
Hargrave, Fred M.
Maricle, Walter E.
Primary Class:
299/25
Other Classes:
172/464, 241/DIG.017, 37/244, 172/177, 172/180, 172/784, 172/549, 299/39.800, 241/294, 172/785, 241/101.750, 172/777, 172/554, 241/277
International Classes:
E01H5/12