1711231

Information

• Patent Grant
• 1711231

• References
• Source

• Patent Number

  1,711,231

• Date Filed

  Not available

• Date Issued

  Tuesday, April 30, 1929
  95 years ago

• CPC

  • B21K5/10 - Forming drill-bit shanks

• US Classifications

  • 072 - Metal deforming
  • 076 - Metal tools and implements, making