375678

Information

• Patent Grant
• 375678

• References
• Source

• Patent Number

  375,678

• Date Filed

  Not available

• Date Issued

  Tuesday, December 27, 1887
  137 years ago

• CPC

  • B21F3/06 - internally on a hollow form
  • Y10T83/487 - Work swings about progressively cutting tool during tool stroke

• US Classifications

  • 072 - Metal deforming
  • 083 - Cutting