3209076

Information

• Patent Grant
• 3209076

• References
• Source

• Patent Number

  3,209,076

• Date Filed

  Not available

• Date Issued

  Tuesday, September 28, 1965
  58 years ago

• CPC

  • H04Q3/00 - Selecting arrangements
  • H04Q1/4535 - with an additional signal transmitted for voice protection

• US Classifications

  • 379 - Telephonic communications