Aluminum-aluminum oxide stylus arm

Apparatus and method for cutting information into a metallic rec

Apparatus and method for recording and playing back sound

Arm pipe for record player tonearms

Arrangement for cutting information into a record carrier made o

Audio signal amplifier for an electromagnetic phono cartridge

Cantilever and phonograph pickup cartridge including said cantil

Cantilever for pickup cartridge

Capacitance detection type stylus with diamond body and electrod

Circuit connection for coils wound on yoke of an electromagnetic

Circuitry for an audio or video disk player

Coil assembly having stacked spiral pattern layers and method of

Crosstalk Canceler

Cutting machine for pits on CD master

Damping material

Damping mechanism for a video disc stylus holder

Device for positioning, transferring and recording...

Device for recording data comprising microdots with free...

Disc reproducing system for compensating mechanical imperfection

Electrodynamic pickup cartridge having simplified coil structure