3531663

Information

• Patent Grant
• 3531663

• References
• Source

• Patent Number

  3,531,663

• Date Filed

  Not available

• Date Issued

  Tuesday, September 29, 1970
  54 years ago

• CPC

  • G01N29/036 - by measuring frequency or resonance of acoustic waves
  • G01H13/00 - Measuring resonant frequency
  • G01N25/18 - by investigating thermal conductivity
  • G01R5/22 - Thermoelectric instruments
  • G01R19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
  • G01R21/02 - by thermal methods
  • G01R29/22 - Measuring piezo-electric properties
  • H01L41/04 - of piezo-electric or electrostrictive devices
  • H03H9/08 - Holders with means for regulating temperature
  • H05B3/26 - heating conductor mounted on insulating base
  • G01N2291/0256 - Adsorption, desorption, surface mass change

• US Classifications

  • 310 - Electrical generator or motor structure