2201296

Information

• Patent Grant
• 2201296

• References
• Source

• Patent Number

  2,201,296

• Date Filed

  Not available

• Date Issued

  Tuesday, May 21, 1940
  84 years ago

• CPC

  • H04Q3/42 - Circuit arrangements for indirect selecting controlled by common circuits
  • H04M1/50 - by generating or selecting currents of predetermined frequencies or combinations of frequencies
  • H04Q5/08 - Signalling by continuous ac

• US Classifications

  • 379 - Telephonic communications