2790188

Information

• Patent Grant
• 2790188

• References
• Source

• Patent Number

  2,790,188

• Date Filed

  Not available

• Date Issued

  Tuesday, April 30, 1957
  68 years ago

• CPC

  • B21J7/145 - the hammers being driven by a rotating annular driving member
  • B21K1/48 - Machines working with hammers

• US Classifications

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