Self-pumped spark gap
Semiconductor device for the vacuum-emission of electrons
Semiconductor device with composite metal heat-radiating plate o
Semiconductor electron-current generating device having improved
Semiconductor light source device in image output device
Semiconductor luminescence device with housing
Sheet metal support for dual arc discharge lamps and method of m
Short arc lamp having a thermally conductive ring
Short-arc type discharge lamp having ventillation apertures...
Shrouded electric lamp having functionally distinguishable...
Shutter speed display for viewfinder of a photographic camera
Single based electric lamp
Single-based high-pressure discharge lamp
Single-based high-pressure discharge lamp with a heat retention
Single-based incadescent lamp construction
Single-ended compact halogen discharge lamp and reflector combin
Sodium vapor lamp for sonic pulse operation
Sodium vapor lamp with emission aperture
Sodium vapor lamp with emission aperture
Sodium vapor lamp with emission aperture