1992389

Information

• Patent Grant
• 1992389

• References
• Source

• Patent Number

  1,992,389

• Date Filed

  Not available

• Date Issued

  Tuesday, February 26, 1935
  90 years ago

• CPC

  • H04M1/52 - Arrangements wherein a dial or equivalent is mechanically coupled to a line selector
  • H04M9/002 - with subscriber controlled access to a line
  • H04M9/005 - with subscriber controlled access to an exchange line

• US Classifications

  • 379 - Telephonic communications