2521401

Information

• Patent Grant
• 2521401

• References
• Source

• Patent Number

  2,521,401

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1950
  76 years ago

• CPC

  • G01P3/14 - by exciting one or more mechanical resonance systems
  • G01R23/02 - Arrangements for measuring frequency

• US Classifications

  • 324 - Electricity: measuring and testing
  • 073 - Measuring and testing
  • 084 - Music