920123

Information

• Patent Grant
• 920123

• References
• Source

• Patent Number

  920,123

• Date Filed

  Not available

• Date Issued

  Tuesday, May 4, 1909
  116 years ago

• CPC

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

• US Classifications

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