1693893

Information

• Patent Grant
• 1693893

• References
• Source

• Patent Number

  1,693,893

• Date Filed

  Not available

• Date Issued

  Tuesday, December 4, 1928
  96 years ago

• CPC

  • G09F11/10 - Electrical control therefor

• US Classifications

  • 040 - Card, picture, or sign exhibiting