2020657

Information

• Patent Grant
• 2020657

• References
• Source

• Patent Number

  2,020,657

• Date Filed

  Not available

• Date Issued

  Tuesday, November 12, 1935
  89 years ago

• CPC

  • B21J7/04 - Power hammers

• US Classifications

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