Off-track PES calibration for a magneto-resistive element
Optical recording medium
Optical recording medium
Optical sensor arrangement for tape cassette
Optical system for magnetic tape end detection
Optical tape end detector in magnetic tape casette with means to
Optically readable disk with self centering hub
Optimally banded disk for use with multiple frequency channel
Opto-magnetic recording medium
Oriented sheet supports in a recording disc
Original disk fabrication method, magnetic recording medium...
Outwardly tensioned magnetic disc cartridge
Over write capable magnetooptical recording medium
Overhanging liner for a disk-cartridge shutter