3781802

Information

• Patent Grant
• 3781802

• References
• Source

• Patent Number

  3,781,802

• Date Filed

  Not available

• Date Issued

  Tuesday, December 25, 1973
  51 years ago

• CPC

  • B41J7/005 - Type-selecting actions or mechanisms by unusual means
  • G09B21/00 - Teaching, or communicating with, the blind, deaf or mute

• US Classifications

  • 340 - Communications: electrical
  • 341 - Coded data generation or conversion
  • 434 - Education and demonstration