1978700

Information

• Patent Grant
• 1978700

• References
• Source

• Patent Number

  1,978,700

• Date Filed

  Not available

• Date Issued

  Tuesday, October 30, 1934
  90 years ago

• CPC

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

• US Classifications

  • 318 - Electricity: motive power systems
  • 310 - Electrical generator or motor structure
  • 379 - Telephonic communications