2875280

Information

• Patent Grant
• 2875280

• References
• Source

• Patent Number

  2,875,280

• Date Filed

  Not available

• Date Issued

  Tuesday, February 24, 1959
  65 years ago

• CPC

  • H04Q3/0008 - using relay selectors in the switching stages

• US Classifications

  • 379 - Telephonic communications