3412494

Information

• Patent Grant
• 3412494

• References
• Source

• Patent Number

  3,412,494

• Date Filed

  Not available

• Date Issued

  Tuesday, November 26, 1968
  56 years ago

• CPC

  • G09B29/14 - Local time charts

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 235 - Registers
  • 434 - Education and demonstration