3614331

Information

• Patent Grant
• 3614331

• References
• Source

• Patent Number

  3,614,331

• Date Filed

  Not available

• Date Issued

  Tuesday, October 19, 1971
  54 years ago

• CPC

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

• US Classifications

  • 379 - Telephonic communications