3634633

Information

• Patent Grant
• 3634633

• References
• Source

• Patent Number

  3,634,633

• Date Filed

  Not available

• Date Issued

  Tuesday, January 11, 1972
  52 years ago

• CPC

  • H04M3/326 - for registers and translators
  • H04Q3/54591 - Supervision

• US Classifications

  • 379 - Telephonic communications