US3176203A
|
|
Negative-resistance tecnetron
|
US3153752A
|
|
Field-effect tubular transistor
|
US3112554A
|
|
Process of manufacturing field-effect transistors
|
US2939057A
|
|
Unipolar field-effect transistors
|
US2930950A
|
|
High power field-effect transistor
|
US2921265A
|
|
Very high frequency field-effect transistors
|
US2987659A
|
|
Unipolar "field effect" transistor
|
US2753496A
|
|
Complexes of multip electrode semi-conductors
|
US2575200A
|
|
Ultrahigh-frequency pulse oscillator
|
US2675477A
|
|
Modulator for pulse transmitters
|
US2500885A
|
|
Electric heating plate
|
US1978969A
|
|
Device for protection of electric nets against overvoltages
|