3226643

Information

• Patent Grant
• 3226643

• References
• Source

• Patent Number

  3,226,643

• Date Filed

  Not available

• Date Issued

  Tuesday, December 28, 1965
  59 years ago

• CPC

  • G08C15/04 - the signals being modulated on carrier frequencies

• US Classifications

  • 375 - Pulse or digital communications
  • 367 - Communications, electrical: acoustic wave systems and devices
  • 455 - Telecommunications