1931548

Information

• Patent Grant
• 1931548

• References
• Source

• Patent Number

  1,931,548

• Date Filed

  Not available

• Date Issued

  Tuesday, October 24, 1933
  91 years ago

• CPC

  • G08C19/20 - operating on dynamo-electric devices
  • Y10T307/944 - Power circuit controlled

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 340 - Communications: electrical
  • 361 - Electricity: electrical systems and devices