1940386

Information

• Patent Grant
• 1940386

• References
• Source

• Patent Number

  1,940,386

• Date Filed

  Not available

• Date Issued

  Tuesday, December 19, 1933
  91 years ago

• CPC

  • B61L1/182 - Use of current of indifferent sort or a combination of different current types
  • Y10T307/898 - Vibrating relay

• US Classifications

  • 363 - Electric power conversion systems
  • 246 - Railway switches and signals
  • 307 - Electrical transmission or interconnection systems