1974779

Information

• Patent Grant
• 1974779

• References
• Source

• Patent Number

  1,974,779

• Date Filed

  Not available

• Date Issued

  Tuesday, September 25, 1934
  91 years ago

• CPC

  • G08B13/04 - by breaking of glass
  • Y10S200/12 - Burglar screens

• US Classifications

  • 200 - Electricity: circuit makers and breakers
  • 340 - Communications: electrical