2188804

Information

• Patent Grant
• 2188804

• References
• Source

• Patent Number

  2,188,804

• Date Filed

  Not available

• Date Issued

  Tuesday, January 30, 1940
  85 years ago

• CPC

  • H02P1/023 - Protection against sparking of contacts or sticking together
  • Y10T307/266 - Polyphase

• US Classifications

  • 318 - Electricity: motive power systems
  • 307 - Electrical transmission or interconnection systems
  • 361 - Electricity: electrical systems and devices