3693390

Information

• Patent Grant
• 3693390

• References
• Source

• Patent Number

  3,693,390

• Date Filed

  Not available

• Date Issued

  Tuesday, September 26, 1972
  52 years ago

• CPC

  • B21C37/18 - conical tubes
  • B21B1/20 - in a non-continuous process,(e.g. skew rolling
  • B21C3/08 - with section defined by rollers, balls, or the like

• US Classifications

  • 072 - Metal deforming