4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Photocell controls its own optical systems

Chong-sam Chung

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Aberration correction element and optical pickup adopting...

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate

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Apparatus for and method of detecting defocus error signal...

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

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Apparatus for generating seek direction detecting signal...

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

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Apparatus for generating seek direction detection signal

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

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Apparatus generating a seek direction detecting signal for...

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

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Profile ID: LFUS-PAI-P-161090

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