1957021

Information

• Patent Grant
• 1957021

• References
• Source

• Patent Number

  1,957,021

• Date Filed

  Not available

• Date Issued

  Tuesday, May 1, 1934
  91 years ago

• CPC

  • B21J7/42 - operated by rotary drive

• US Classifications

  • 072 - Metal deforming
  • 173 - Tool driving or impacting