1843980

Information

• Patent Grant
• 1843980

• References
• Source

• Patent Number

  1,843,980

• Date Filed

  Not available

• Date Issued

  Tuesday, February 9, 1932
  93 years ago

• CPC

  • G02B6/0051 - Diffusing sheet or layer
  • G02B6/0065 - Manufacturing aspects; Material aspects
  • G02B6/0031 - Reflecting element, sheet or layer
  • G02B6/006 - to produce indicia, symbols, texts or the like
  • G09F2013/1845 - Interchangeable poster
  • G09F2013/1877 - Stand-like

• US Classifications

  • 040 - Card, picture, or sign exhibiting