1899425

Information

• Patent Grant
• 1899425

• References
• Source

• Patent Number

  1,899,425

• Date Filed

  Not available

• Date Issued

  Tuesday, February 28, 1933
  91 years ago

• CPC

  • H02H3/407 - using induction relays

• US Classifications

  • 361 - Electricity: electrical systems and devices