3831550

Information

• Patent Grant
• 3831550

• References
• Source

• Patent Number

  3,831,550

• Date Filed

  Not available

• Date Issued

  Tuesday, August 27, 1974
  50 years ago

• CPC

  • G10K5/02 - Ultrasonic whistles

• US Classifications

  • 116 - Signals and indicators
  • 239 - Fluid sprinkling, spraying, and diffusing