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Phase comparing apparatus and focus error detecting apparatus

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
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Phase shifting feedback control in an optical disk drive

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
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Photo sensor device and optical pickup device

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
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Photo-detecting device

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
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Photo-detecting device

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
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Photo-detecting device including offset correction

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
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Photochromic optical disk read/write apparatus which prevents de

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
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Photodetecting system for a magneto-optical disk head system

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
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Photodetector unit, and optical pickup, optical reproduction...

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate

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Photodisc apparatus with gain control of tracking servo loop

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
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Photodisc apparatus with means for canceling offset of tracking

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
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Pick-up angle adjustment mechanism for optical disk apparatus

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate

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Pick-up device for optical disk readout using waveguide gratings

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent

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Pick-up device positioning arrangement in an information disc pl

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track...
Patent

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Pick-up point dislocation detecting device in recording a disc p

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent

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Pickup actuator

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate

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Pickup actuator for disk-type media

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent

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Pickup control device for optical disk drive which adjusts...

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate

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Pickup control method and apparatus, and disk unit with gain con

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
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Pickup device

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate

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