Herman G. Lakerveld

Pivoting mirror device

Digital sum value corrective scrambling in the compact digital disc system

Playing apparatus, in particular a video player for playing a record which is made of a transparent material and provided with a central hole

Multi-phase alternating current machine with stepped stator

Rotary-anode X-ray tube

Selective scrambling in the compact disc system

Selektives verwuerfeln beim compact disc Selective scrambling of the compact disc

X-ray tube with rotating anode

Abspielvorrichtung, insbesondere ein video-plattenspieler zum abspielen einer mit einem zentralloch versehenen aus durchsichtigem material hergestellten platte Playback device, particularly a video-players to play a plate manufactured with a central hole provided in transparent material

Video disc player for playing records of different thickness