1494173

Information

• Patent Grant
• 1494173

• References
• Source

• Patent Number

  1,494,173

• Date Filed

  Not available

• Date Issued

  Tuesday, May 13, 1924
  100 years ago

• CPC

  • H01H63/22 - using step-by-step electromagnetic drive without ratchet

• US Classifications

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