1947255

Information

• Patent Grant
• 1947255

• References
• Source

• Patent Number

  1,947,255

• Date Filed

  Not available

• Date Issued

  Tuesday, February 13, 1934
  91 years ago

• CPC

  • G08C15/10 - the signals being represented by frequencies or phase of current or voltage in transmission link

• US Classifications

  • 340 - Communications: electrical