1639895

Information

• Patent Grant
• 1639895

• References
• Source

• Patent Number

  1,639,895

• Date Filed

  Not available

• Date Issued

  Tuesday, August 23, 1927
  97 years ago

• CPC

  • B21G3/26 - by cutting from strip or sheet material

• US Classifications

  • 470 - Threaded, headed fastener, or washer making: process and apparatus
  • 072 - Metal deforming