434835

Information

• Patent Grant
• 434835

• References
• Source

• Patent Number

  434,835

• Date Filed

  Not available

• Date Issued

  Tuesday, August 19, 1890
  134 years ago

• CPC

  • G08B25/14 - Central alarm receiver or annunciator arrangements
  • H04N7/163 - by receiver means only
  • Y10S200/35 - Weight operated tread/treadless switch

• US Classifications

  • 340 - Communications: electrical
  • 109 - Safes, bank protection, or a related device
  • 178 - Telegraphy
  • 200 - Electricity: circuit makers and breakers