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in which work is subjected to permanent internal twisting
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CPC
B21B15/02
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Parent Industries
B
PERFORMING OPERATIONS TRANSPORTING
B21
Mechanical metalworking
B21B
ROLLING OF METAL
B21B15/00
Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
Current Industry
B21B15/02
in which work is subjected to permanent internal twisting
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Patents Grants
last 30 patents
Information
Patent Grant
Apparatus for manufacturing core wire for optical fibers
Patent number
4,776,195
Issue date
Oct 11, 1988
Netsuren Co., Ltd.
Tetsukazu Fukuhara
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
2160268
Patent number
2,160,268
Issue date
May 30, 1939
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Grant
1861525
Patent number
1,861,525
Issue date
Jun 7, 1932
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Grant
1749671
Patent number
1,749,671
Issue date
Mar 4, 1930
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...