1920818

Information

• Patent Grant
• 1920818

• References
• Source

• Patent Number

  1,920,818

• Date Filed

  Not available

• Date Issued

  Tuesday, August 1, 1933
  90 years ago

• CPC

  • H01H53/12 - Ferraris relays

• US Classifications

  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets
  • 310 - Electrical generator or motor structure
  • 336 - Inductor devices