3679813

Information

• Patent Grant
• 3679813

• References
• Source

• Patent Number

  3,679,813

• Date Filed

  Not available

• Date Issued

  Tuesday, July 25, 1972
  52 years ago

• CPC

  • H04N7/164 - Coin-freed apparatus
  • H04N7/10 - Adaptations for transmission by electric cable

• US Classifications

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