1213723

Information

• Patent Grant
• 1213723

• References
• Source

• Patent Number

  1,213,723

• Date Filed

  Not available

• Date Issued

  Tuesday, January 23, 1917
  109 years ago

• CPC

  • H03M1/22 - Pattern-reading type
  • G08C19/02 - in which the signal transmitted is magnitude of current or voltage

• US Classifications

  • 340 - Communications: electrical
  • 073 - Measuring and testing