Removable disk cartridge with improved hub locking mechanism

Removable disk construction

Removable disk to drive engagement

Resettable single play tape cassette

Resilient protrusion for positioning in a spool of a magnetic ta

Resinous disc cartridge containing an ester compound of glycerin

Restraining and sealing mechanism for disc cartridge

Reusable record tab for videotape cassette

Ribbed cleaning apparatus for disk cartridges

Rotatable door and door opening mechanism for a cartridge

Safety device for tape cassettes for positionally correct insert

Scent cassette

Sealed cassette containing recording carrier tape

Sealed removable cartridge for use with a high density disc driv

Selectively reversible video cassette

Self identifying universal data storage element

Self identifying universal data storage element

Self identifying universal data storage element with human intel

Self sealing data storage element

Self-cleaning high-capacity, removable hard cartridge disk