2976619

Information

• Patent Grant
• 2976619

• References
• Source

• Patent Number

  2,976,619

• Date Filed

  Not available

• Date Issued

  Tuesday, March 28, 1961
  63 years ago

• CPC

  • G09B19/26 - Dot-and dash telegraphic codes

• US Classifications

  • 434 - Education and demonstration