Substation Or Terminal Circuitry (379/387) Patents and Patent Applications (Class 379/FOR184) - Justia Patents Search

Substation Or Terminal Circuitry (379/387) Patents (Class 379/FOR184)

Foreign Patent Art Collections

For loudspeaking terminal (379/388) (Class 379/FOR185)

With circuitry for voice control of transmission direction (379/389) (Class 379/FOR186)
With amplification or attenuation level control (379/390) (Class 379/FOR187)

There are no patents to show for this class.