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United States Patent 3467173

Inventors:
Tisdale Jr., Norman F.
Publication Date:
09/16/1969
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Assignee:
SUSQUEHANNA CORP
Primary Class:
164/339
Other Classes:
249/201, 164/359, 164/53, 249/106
International Classes:
B22D7/10; B22D7/00; B22D23/02; B22D7/10




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