1756589

Information

• Patent Grant
• 1756589

• References
• Source

• Patent Number

  1,756,589

• Date Filed

  Not available

• Date Issued

  Tuesday, April 29, 1930
  94 years ago

• CPC

  • B61L1/186 - Use of rectified alternating current
  • Y10T307/615 - Substitute or emergency source
  • Y10T307/625 - Storage battery or accumulator

• US Classifications

  • 246 - Railway switches and signals
  • 307 - Electrical transmission or interconnection systems
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems