Title:
SET OF DISCS HAVING DIFFERENT FLOATATION CHARACTERISTICS
United States Patent 3544113
Inventors:
Hand, Kenneth E.
Publication Date:
12/01/1970
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Assignee:
Kenneth, Hand E.
Primary Class:
Other Classes:
273/126R
International Classes:
A63H33/18; A63H33/00; A63B67/06; A63B65/10