1824473

Information

• Patent Grant
• 1824473

• References
• Source

• Patent Number

  1,824,473

• Date Filed

  Not available

• Date Issued

  Tuesday, September 22, 1931
  93 years ago

• CPC

  • G08B13/00 - Burglar, theft, or intruder alarms
  • G08B13/1672 - using sonic detecting means
  • Y10S200/08 - Disturbance
  • Y10S200/20 - Sound and vibration operated

• US Classifications

  • 367 - Communications, electrical: acoustic wave systems and devices
  • 200 - Electricity: circuit makers and breakers