2197501

Information

• Patent Grant
• 2197501

• References
• Source

• Patent Number

  2,197,501

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1940
  84 years ago

• CPC

  • H02M7/046 - using discharge tubes
  • H01H63/24 - with continuous motion of wiper until a selected position is reached
  • Y10T74/18152 - Belt or chain carried member

• US Classifications

  • 379 - Telephonic communications
  • 074 - Machine element or mechanism