3891869

Information

• Patent Grant
• 3891869

• References
• Source

• Patent Number

  3,891,869

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1975
  49 years ago

• CPC

  • G01F1/66 - by measuring frequency, phaseshift, or propagation time of electro-magnetic or other waves
  • Y10S116/19 - Wave generator with resonating element

• US Classifications

  • 310 - Electrical generator or motor structure
  • 073 - Measuring and testing
  • 116 - Signals and indicators
  • 367 - Communications, electrical: acoustic wave systems and devices