3677054

Information

• Patent Grant
• 3677054

• References
• Source

• Patent Number

  3,677,054

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1972
  52 years ago

• CPC

  • B21F3/027 - with extended ends formed in a special shape
  • B21F3/12 - of interconnected helical springs

• US Classifications

  • 072 - Metal deforming