Balanced reel hub for tape cassette reels

Ball bearing cam assembly

Bar code scanner

Bar/dot level meter

Base film of digital compact cassette tape

Baseplate assembly for a disc drive

Battery holder of cassette tape player

Beam addressable file using amorphous magnetic material

Beam control system

Beam track position control apparatus for optical disk...

Bearing arrangement for a record player tonearm

Bearing ring with low sliding friction for an optical disk

Belt driven cartridge with magnetic brake assembly

Belt driven tape cartridge

Bernoulli plate in cartridge

Bi-directional rotary drive mechanism

Bi-directional tape transport apparatus

Bi-directional tape transport with reversible heads

Bias coil for magneto-optical drive

Bias control method and apparatus for magnetic recording