1630989

Information

• Patent Grant
• 1630989

• References
• Source

• Patent Number

  1,630,989

• Date Filed

  Not available

• Date Issued

  Tuesday, May 31, 1927
  97 years ago

• CPC

  • G01R11/30 - Dynamo-electric motor meters

• US Classifications

  • 324 - Electricity: measuring and testing
  • 346 - Recorders