Holder for a rigid information disc and loading-system comprisin

Hub-chucking type disklike recording means

Impact-absorbing buffer element for optical disk carrier

Information medium with improved temperature characteristics

Information memory medium

Information memory unit

Information recording and reproducing apparatus, a cartridge for

Information-disc cassette

Insert for drives for optical storage mediums

Laser access apparatus for optical disk drive

Light-tight optical disk cartridge

Low profile and medium protecting cartridge assembly

Magnetically recordable label for mechanically-defined informati

Magneto-optical disk and method of manufacturing the same

Magneto-optical disk cartridge and magneto-optical disk...

Magneto-optical disk hub in which the inner peripheral edge port

Magneto-optical disk hub in which the inner peripheral edge port

Method and apparatus for dampening disk vibrations

Method and apparatus for using a disk cartridge with...

Method and device for write protecting compact disk media