2731620

Information

• Patent Grant
• 2731620

• References
• Source

• Patent Number

  2,731,620

• Date Filed

  Not available

• Date Issued

  Tuesday, January 17, 1956
  69 years ago

• CPC

  • H04N7/164 - Coin-freed apparatus
  • G07F17/28 - for radio apparatus

• US Classifications

  • 340 - Communications: electrical
  • 178 - Telegraphy
  • 194 - Check-actuated control mechanisms
  • 346 - Recorders
  • 348 - Television
  • 380 - Cryptography
  • 725 - Interactive video distribution systems