1977223

Information

• Patent Grant
• 1977223

• References
• Source

• Patent Number

  1,977,223

• Date Filed

  Not available

• Date Issued

  Tuesday, October 16, 1934
  90 years ago

• CPC

  • B21D3/08 - which move in an orbit without rotating round the work
  • Y10T29/5185 - Tube making

• US Classifications

  • 072 - Metal deforming
  • 029 - Metal working
  • 451 - Abrading