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Aluminum-aluminum oxide stylus arm

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Mechanical modification or sensing of storage medium
Patent

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Apparatus and method for cutting information into a metallic rec

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Mechanical modification or sensing of storage medium
Patent

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Apparatus and method for recording and playing back sound

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Mechanical modification or sensing of storage medium
Reexamination Certificate

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Arm pipe for record player tonearms

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Mechanical modification or sensing of storage medium
Patent

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Arrangement for cutting information into a record carrier made o

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Mechanical modification or sensing of storage medium
Patent

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Audio signal amplifier for an electromagnetic phono cartridge

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Mechanical modification or sensing of storage medium
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