1889107

Information

• Patent Grant
• 1889107

• References
• Source

• Patent Number

  1,889,107

• Date Filed

  Not available

• Date Issued

  Tuesday, November 29, 1932
  92 years ago

• CPC

  • H04Q3/42 - Circuit arrangements for indirect selecting controlled by common circuits
  • E04H6/34 - characterised by use of movable platforms

• US Classifications

  • 379 - Telephonic communications