Line cleaning device
United States Patent 2222191

Inventors:
Zissnan, Louis H.
Publication Date:
11/19/1940
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Assignee:
Zissnan, Louis H.
Primary Class:
15/220.400
Other Classes:
15/104.040, 15/188, 15/256.600
International Classes:
E21B33/08; E21B33/02