1428777

Information

• Patent Grant
• 1428777

• References
• Source

• Patent Number

  1,428,777

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1922
  102 years ago

• CPC

  • B21D53/18 - of hollow or C-shaped cross-section
  • Y10T29/5123 - including nonrotary flying tool

• US Classifications

  • 029 - Metal working