3678305

Information

• Patent Grant
• 3678305

• References
• Source

• Patent Number

  3,678,305

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1972
  52 years ago

• CPC

  • H03F3/54 - Amplifiers using transit-time effect in tubes or semiconductor devices
  • H03F13/00 - Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers
  • H03H9/02543 - Characteristics of substrate
  • H03H9/145 - for networks using surface acoustic waves
  • H03H9/42 - using surface acoustic waves
  • H04R17/08 - signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

• US Classifications

  • 310 - Electrical generator or motor structure
  • 330 - Amplifiers
  • 333 - Wave transmission lines and networks