3690138

Information

• Patent Grant
• 3690138

• References
• Source

• Patent Number

  3,690,138

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1972
  52 years ago

• CPC

  • B21B1/42 - for step-by-step or planetary rolling

• US Classifications

  • 072 - Metal deforming