Metal tools and implements – making – Blank or process – Die
Patent
1977-03-28
1978-03-14
Whitehead, Harold D.
Metal tools and implements, making
Blank or process
Die
228131, 75208R, 428552, B21K 520, B22F 708
Patent
active
040784568
ABSTRACT:
A wire drawing die blank and method of producing the same is provided in which the blank is made by:
REFERENCES:
patent: 1944758 (1934-01-01), Roux
patent: 2689641 (1954-09-01), Lips et al.
patent: 2866364 (1958-12-01), Bieberich
patent: 2913819 (1959-11-01), Andreotti et al.
patent: 3831428 (1974-08-01), Wentorf, Jr.
patent: 3978744 (1976-09-01), Zachman
Cabot Corporation
Parker Roscoe V.
Phillips Joseph J.
Schuman Jack
Whitehead Harold D.
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