1858920

Information

• Patent Grant
• 1858920

• References
• Source

• Patent Number

  1,858,920

• Date Filed

  Not available

• Date Issued

  Tuesday, May 17, 1932
  92 years ago

• CPC

  • B21B19/04 - Rolling basic material of solid, i.e. non-hollow, structure Piercing
  • B21B19/08 - Enlarging tube diameter

• US Classifications

  • 072 - Metal deforming