
Siemens AG
Silicon N Channel MOSFET Tetrode

Vishay Semiconductors
N-channel dual-gate MOS-FET

Vishay Semiconductors
N–Channel Dual Gate MOS-Fieldeffect Tetrode, Depletion Mode

Vishay Semiconductors
N–Channel Dual Gate MOS-Fieldeffect Tetrode, Depletion Mode

NXP Semiconductors.
UHF power transistor