1137840

Information

• Patent Grant
• 1137840

• References
• Source

• Patent Number

  1,137,840

• Date Filed

  Not available

• Date Issued

  Tuesday, May 4, 1915
  109 years ago

• CPC

  • H01H53/12 - Ferraris relays

• US Classifications

  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets