FLASH LAMPS FOR PHOTOGRAPHIC PURPOSES, BEING ACTIVATED BY ELECTRIC AND NON-ELECTRIC MEANS

ELECTRIC DISCHARGE LAMPS AND FLUORESCENT TUBULAR LAMPS

Electronic Tubes, Cathode Ray Tubes, and Semiconductor Devices-Namely, Diodes, Rectifiers, Controlled Rectifiers, Transistors, and Tunnel Diodes, All Incorporating Germanium or Silicon

INCANDESCENT ELECTRIC LAMPS AND FITTINGS OF ORDINARY METAL FOR THE SAME