3797297

Information

• Patent Grant
• 3797297

• References
• Source

• Patent Number

  3,797,297

• Date Filed

  Not available

• Date Issued

  Tuesday, March 19, 1974
  50 years ago

• CPC

  • B21D39/06 - of tubes in openings
  • B21D39/18 - Rollers of special shape
  • B21D41/02 - Enlarging

• US Classifications

  • 072 - Metal deforming