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JPS63228888A
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Recorded video tape and its production
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JPS58123289A
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Recording method for duplication-protected video- recorded magnetic tape
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DD147733A5
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Magnetkopfstellungsjustiereinrichtung
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DD147976A5
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Magnetic replay system for learning purposes
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DD147977A5
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Magnetic sound playing system
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IT7969345D0
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Magnetic head position adjustment device e.g. for audio-visual appts.
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IT7969343D0
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Magnetic card teaching system
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IT7969344D0
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Reproducer using four circular coaxial magnetic tracks
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WO8000892A1
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Educational magnetic reproduction apparatus
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NL7920098A
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Mechanism for adjusting the position of a magnetic head of a magnetic tape including recording and / or displaying device.
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GB2016783A
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Recording medium for audio-visual teaching machines
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GB2016784A
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Audio-visual teaching machine
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WO7901091A1
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Optical device for wide-scope
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JPS5569110A
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Optical device for cinemascope
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JPS54151831A
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Optical device for cinemascope
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GB1601794A
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Film-strip projector
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JPS54101305A
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Learning magnetic tape recorder reproducer
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JPS54101304A
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Learning magnetic tape recorder reproducer
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JPS5494012A
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Magnetic recorder*reproducer
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JPS5494013A
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Magnetic recorder*reproducer
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