Optical data recording medium

Optical data storage and recording medium having a replaceable p

Optical data storage medium

Optical disc

Optical disc and method of manufacturing

Optical disc assemblies for optical disc write/read apparatus

Optical disc humidity protected

Optical disc pressure-collapsible cover

Optical disc structure

Optical disc structure having an air sandwich structure

Optical disc unit, fabrication method and cooperating write and/

Optical disc unit, fabrication method and cooperating write and/

Optical disc write/read apparatus

Optical disc write/read apparatus with disc mounting means

Optical disk

Optical disk having elastic deformable spacer

Optical disk mounting means for write/read apparatus

Optical floppy disc data storage and retrieval techniques

Optical foam-spacer disk assembly

Optical fungicide-treated information recording and reproducing