2070878

Information

• Patent Grant
• 2070878

• References
• Source

• Patent Number

  2,070,878

• Date Filed

  Not available

• Date Issued

  Tuesday, February 16, 1937
  87 years ago

• CPC

  • H04M3/4876 - Time announcements

• US Classifications

  • 379 - Telephonic communications
  • 340 - Communications: electrical