3365554

Information

• Patent Grant
• 3365554

• References
• Source

• Patent Number

  3,365,554

• Date Filed

  Not available

• Date Issued

  Tuesday, January 23, 1968
  57 years ago

• CPC

  • H04M1/32 - Locking setting devices during transmission to prevent interference by user

• US Classifications

  • 379 - Telephonic communications
  • 200 - Electricity: circuit makers and breakers
  • D14 - Recording, communication, or information retrieval equipment