4. Optics: motion pictures
  5. With sound accompaniment
  6. Selectively operable plural records, recorders or reproducers
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Changeover control arrangement for projection apparatus

Optics: motion pictures – With sound accompaniment – Selectively operable plural records – recorders or reproducers
Patent

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Device for recording full picture frames onto a...

Optics: motion pictures – With sound accompaniment – Selectively operable plural records – recorders or reproducers
Reexamination Certificate

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Dual sound system

Optics: motion pictures – With sound accompaniment – Selectively operable plural records – recorders or reproducers
Patent

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Film projection system

Optics: motion pictures – With sound accompaniment – Selectively operable plural records – recorders or reproducers
Patent

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Sprocketed film transport

Optics: motion pictures – With sound accompaniment – Selectively operable plural records – recorders or reproducers
Patent

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System for motion picture film previewing

Optics: motion pictures – With sound accompaniment – Selectively operable plural records – recorders or reproducers
Patent

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Video karaoke system and method of use

Optics: motion pictures – With sound accompaniment – Selectively operable plural records – recorders or reproducers
Reexamination Certificate

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Video karaoke system and method of use

Optics: motion pictures – With sound accompaniment – Selectively operable plural records – recorders or reproducers
Reexamination Certificate

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