3647970

Information

• Patent Grant
• 3647970

• References
• Source

• Patent Number

  3,647,970

• Date Filed

  Not available

• Date Issued

  Tuesday, March 7, 1972
  53 years ago

• CPC

  • H04K1/06 - by transmitting the information of elements thereof at unnatural speeds or in jumbled order or backwards
  • G10L25/00 - Speech or voice analysis techniques not restricted to a single one of groups G10L15/00-G10L21/00
  • H04J1/18 - in which all the carriers are amplitude-modulated

• US Classifications

  • 380 - Cryptography
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 704 - Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression