3478162

Information

• Patent Grant
• 3478162

• References
• Source

• Patent Number

  3,478,162

• Date Filed

  Not available

• Date Issued

  Tuesday, November 11, 1969
  55 years ago

• CPC

  • H04N7/164 - Coin-freed apparatus
  • H04N7/17363 - at or near the user terminal
  • H04N2007/1739 - the upstream communication being transmitted via a separate link

• US Classifications

  • 725 - Interactive video distribution systems
  • 348 - Television
  • 380 - Cryptography