1872372

Information

• Patent Grant
• 1872372

• References
• Source

• Patent Number

  1,872,372

• Date Filed

  Not available

• Date Issued

  Tuesday, August 16, 1932
  92 years ago

• CPC

  • G09F19/00 - Miscellaneous advertising or display means not provided for elsewhere
  • Y10S200/20 - Sound and vibration operated
  • Y10T307/944 - Power circuit controlled

• US Classifications

  • 367 - Communications, electrical: acoustic wave systems and devices
  • 040 - Card, picture, or sign exhibiting
  • 104 - Railways
  • 200 - Electricity: circuit makers and breakers
  • 307 - Electrical transmission or interconnection systems
  • 315 - Electric lamp and discharge devices: systems
  • 361 - Electricity: electrical systems and devices