Method of making balls
United States Patent 3206828
US Patent References:
Ball forming die
- - 2700908


Inventors:
Takefusa, Kikuchi
Publication Date:
09/21/1965
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Assignee:
TAIYU SHOJI KK
Primary Class:
29/899
Other Classes:
29/413, 72/93
International Classes:
B21H1/14; B21H1/00