Class 369/131 - Bidirectional information flow (e.g., record/replay switching)

Subclass of Class 369 - Dynamic information storage or retrieval
Definition: Subject matter wherein the signal processing is switchable
No. of patents: 4
Last issue date: 01/16/2007

Number	Title	Issue Date
7165263	Method for annealing domain wall displacement type magneto-optical disc and magneto-optical disc A manufacturing method of a domain wall displacement type magneto-optical recording medium comprises the steps of depositing a magnetic layer on a substrate to prepare a disc, and irradiating the magnetic layer with a converged light beam while applying a magnetic f...	01/16/2007
5193083	Optical pick-up device An optical pick-up device comprises a light source, a light beam switching unit, a light intensity change unit and a signal detection unit including photodiodes. A light beam emitted from the light source and irradiated on an information recording medium ...	03/09/1993
4410976	Signal pickup device in a rotary recording medium reproducing apparatus A signal pickup device in a rotary recording medium reproducing apparatus, comprises a cantilever provided with a reproducing element for picking up and reproducing a signal from a rotary recording medium at the tip end thereof, a support member having a ...	10/18/1983
4281407	Surface acoustic wave pickup and recording device A surface acoustic wave (SAW) pickup and record stylus is constructed from an elongated substrate which supports the propagation of SAW. The substrate is tapered to a tip at one end and a fan-shaped interdigital electrode structure having curved fingers i...	07/28/1981

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