3749947

Information

• Patent Grant
• 3749947

• References
• Source

• Patent Number

  3,749,947

• Date Filed

  Not available

• Date Issued

  Tuesday, July 31, 1973
  51 years ago

• CPC

  • H03K17/967 - having a plurality of control members
  • H03K5/15046 - using a tapped delay line
  • H04M1/23 - Construction or mounting of dials or of equivalent devices Means for facilitating the use thereof
  • H04R17/08 - signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously
  • Y10S200/20 - Sound and vibration operated

• US Classifications

  • 310 - Electrical generator or motor structure
  • 200 - Electricity: circuit makers and breakers
  • 361 - Electricity: electrical systems and devices