3808538

Information

• Patent Grant
• 3808538

• References
• Source

• Patent Number

  3,808,538

• Date Filed

  Not available

• Date Issued

  Tuesday, April 30, 1974
  50 years ago

• CPC

  • G08B3/1075 - Paging racks
  • G08B3/1008 - Personal calling arrangements or devices

• US Classifications

  • 340 - Communications: electrical