Automatic detecting device for land pre-pits signals

Bi-level optical media having embossed header format

Bonded optical disk with internal abutting structure to control

Bump-forming media including thin intermediate reflective layer

Calibrating an optical detector to minimize noise from undesired

Card compact disc, compact disc interface seat and methods...

Card including rotatory system optical recording medium

Cardlike optical recording medium

Carrier for data storage disk

Carrier retainer for disk cartridge

Cartridge adaptor

Cartridge adaptor and a cartridge to be accommodated in the cart

Cartridge adaptor and a cartridge to be accommodated in the cart

Cartridge and manufacturing method thereof

Cartridge and method of cleaning recordation medium surface

Cartridge case for a disk

Cartridge case for a disk-shaped recording medium with...

Cartridge for a recording reproducing medium having a shutter co

Cartridge for accommodating a disc

Cartridge for accomodating optical discs of different sizes