Tool for expanding and contracting pipe clamping collars
United States Patent 1991150
Inventors:
Hammon, Dwight E.
Publication Date:
02/12/1935
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Assignee:
Hammon, Dwight E.
Primary Class:
Other Classes:
29/224, 29/238
International Classes:
B25B25/00; B25B27/10; B25B27/12; B25B27/02