Protective rim for storage discs
Protective structure for jacket for rotatable magnetic...
Protector circuit for magnetically recorded sprocket signals
Protuberant optical recording medium
Providing glass plate master disk with metal layers and...
Pseudo-reflective read inhibitor for optical storage media
Psk modulation in ac bias data recording
Public address apparatus
Pulse crowding compensation for magnetic recording
Pulse discrimination system
Punch machine for machine actuator cards
Punched card to magnetic tape converter
Push button assembly
Push rod type tape recorder operating device
Push-threading tape in a helical path
Push-threading tape in a helical path