3436477

Information

• Patent Grant
• 3436477

• References
• Source

• Patent Number

  3,436,477

• Date Filed

  Not available

• Date Issued

  Tuesday, April 1, 1969
  55 years ago

• CPC

  • H04L12/02 - Details
  • H04M1/278 - using punched cards or tapes

• US Classifications

  • 178 - Telegraphy
  • 341 - Coded data generation or conversion
  • 379 - Telephonic communications