3680349

Information

• Patent Grant
• 3680349

• References
• Source

• Patent Number

  3,680,349

• Date Filed

  Not available

• Date Issued

  Tuesday, August 1, 1972
  52 years ago

• CPC

  • B21C37/292 - Forming collars by drawing or pushing a rigid forming tool through an opening in the tube wall
  • Y10T29/49403 - Tapping device making

• US Classifications

  • 072 - Metal deforming
  • 029 - Metal working