1688858

Information

• Patent Grant
• 1688858

• References
• Source

• Patent Number

  1,688,858

• Date Filed

  Not available

• Date Issued

  Tuesday, October 23, 1928
  96 years ago

• CPC

  • G01R11/42 - Circuitry therefor

• US Classifications

  • 324 - Electricity: measuring and testing