3548457

Information

• Patent Grant
• 3548457

• References
• Source

• Patent Number

  3,548,457

• Date Filed

  Not available

• Date Issued

  Tuesday, December 22, 1970
  53 years ago

• CPC

  • B21D21/00 - Combined processes according to methods covered by groups B21D1/00 - B21D19/00
  • B29C57/125 - using tools with helical grooves

• US Classifications

  • 425 - Plastic article or earthenware shaping or treating: apparatus