2915743

Information

• Patent Grant
• 2915743

• References
• Source

• Patent Number

  2,915,743

• Date Filed

  Not available

• Date Issued

  Tuesday, December 1, 1959
  65 years ago

• CPC

  • G08B27/00 - Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations
  • Y10T307/375 - Different frequencies
  • Y10T307/664 - Differing frequencies

• US Classifications

  • 340 - Communications: electrical
  • 307 - Electrical transmission or interconnection systems