Programmable strip chart recorder
Protected optical disc
Protected optical disc
Protected optical disc comprising a flexible closure element
Protective construction for optical disk units
Protuberant optical recording medium
Protuberant optical recording medium
Radial access drive for an optical disk recorder
Radiation-sensitive record disc
Radiation-sensitive record disc with improved internal structure
Radiation-sensitive record utilizing an annular ring and project
Radiation-sensitive record with protected sensitive surface
Record apparatus
Record carrier for an electro-erosion printer and method for mak
Record carrier for electro-erosion printers
Record playback apparatus and information record therefor
Record spool holder
Recorder
Recorder for an underwater detection system
Recorder having a recording device and a relatively movable stac