2809421

Information

• Patent Grant
• 2809421

• References
• Source

• Patent Number

  2,809,421

• Date Filed

  Not available

• Date Issued

  Tuesday, October 15, 1957
  67 years ago

• CPC

  • B21C37/24 - annularly-ribbed tubes
  • Y10T29/53839 - having percussion or explosive operator
  • Y10T29/53996 - by deforming

• US Classifications

  • 029 - Metal working
  • 140 - Wireworking