3696358

Information

• Patent Grant
• 3696358

• References
• Source

• Patent Number

  3,696,358

• Date Filed

  Not available

• Date Issued

  Tuesday, October 3, 1972
  52 years ago

• CPC

  • G09F25/00 - Audible advertising
  • Y10S40/906 - Sound

• US Classifications

  • 360 - Dynamic magnetic information storage or retrieval
  • 040 - Card, picture, or sign exhibiting
  • 340 - Communications: electrical
  • 369 - Dynamic information storage or retrieval