1808021

Information

• Patent Grant
• 1808021

• References
• Source

• Patent Number

  1,808,021

• Date Filed

  Not available

• Date Issued

  Tuesday, June 2, 1931
  93 years ago

• CPC

  • D21H27/04 - marbled
  • D21H5/06 - Apparatus

• US Classifications

  • 162 - Paper making and fiber liberation