2161744

Information

• Patent Grant
• 2161744

• References
• Source

• Patent Number

  2,161,744

• Date Filed

  Not available

• Date Issued

  Tuesday, June 6, 1939
  85 years ago

• CPC

  • G01R9/02 - Vibration galvanometers
  • G01R13/04 - for producing permanent records

• US Classifications

  • 324 - Electricity: measuring and testing
  • 248 - Supports