1806871

Information

• Patent Grant
• 1806871

• References
• Source

• Patent Number

  1,806,871

• Date Filed

  Not available

• Date Issued

  Tuesday, May 26, 1931
  93 years ago

• CPC

  • G01H3/00 - Measuring characteristics of vibrations by using a detector in a fluid
  • Y10S84/24 - Piezoelectrical transducers
  • Y10S200/20 - Sound and vibration operated

• US Classifications

  • 073 - Measuring and testing
  • 084 - Music
  • 200 - Electricity: circuit makers and breakers
  • 310 - Electrical generator or motor structure
  • 340 - Communications: electrical