2236797

Information

• Patent Grant
• 2236797

• References
• Source

• Patent Number

  2,236,797

• Date Filed

  Not available

• Date Issued

  Tuesday, April 1, 1941
  84 years ago

• CPC

  • H04Q5/20 - the subordinate centre permitting interconnection of subscribers connected thereto

• US Classifications

  • 379 - Telephonic communications