3397721

Information

• Patent Grant
• 3397721

• References
• Source

• Patent Number

  3,397,721

• Date Filed

  Not available

• Date Issued

  Tuesday, August 20, 1968
  56 years ago

• CPC

  • E04C5/08 - Members specially adapted to be used in prestressed constructions
  • B21F9/00 - Straining wire
  • B21F9/005 - to affect the material properties of the wire
  • B21F9/007 - to induce a plastic deformation of the wire

• US Classifications

  • 140 - Wireworking
  • 072 - Metal deforming