1800071

Information

• Patent Grant
• 1800071

• References
• Source

• Patent Number

  1,800,071

• Date Filed

  Not available

• Date Issued

  Tuesday, April 7, 1931
  93 years ago

• CPC

  • B42D9/02 - Automatic bookmarkers

• US Classifications

  • 040 - Card, picture, or sign exhibiting