919646

Information

• Patent Grant
• 919646

• References
• Source

• Patent Number

  919,646

• Date Filed

  Not available

• Date Issued

  Tuesday, April 27, 1909
  115 years ago

• CPC

  • G04C13/0463 - Arrangements for generating normal driving pulses

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 200 - Electricity: circuit makers and breakers
  • 324 - Electricity: measuring and testing
  • 340 - Communications: electrical