2532889

Information

• Patent Grant
• 2532889

• References
• Source

• Patent Number

  2,532,889

• Date Filed

  Not available

• Date Issued

  Tuesday, December 5, 1950
  74 years ago

• CPC

  • H04M3/60 - Semi-automatic systems
  • H04M5/10 - using separate plug for each subscriber

• US Classifications

  • 379 - Telephonic communications