2513375

Information

• Patent Grant
• 2513375

• References
• Source

• Patent Number

  2,513,375

• Date Filed

  Not available

• Date Issued

  Tuesday, July 4, 1950
  74 years ago

• CPC

  • G08B5/28 - with hinged flap or arm

• US Classifications

  • 379 - Telephonic communications
  • 340 - Communications: electrical