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GB498665A
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Improvements in or relating to optical projection apparatus
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GB496873A
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Improvements in or relating to optical projection apparatus
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GB492693A
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Improvements in or relating to mechanism for feeding or drawing a tape or printed web through a projection field
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GB486472A
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Apparatus for controlling a character-bearing tape for movement through a projection field
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GB492527A
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Apparatus for moving a tape or web from a recording device through a projection field
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US2029938A
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Projection apparatus
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US2084031A
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Tape-drawing arrangement
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GB419177A
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Improvements in or relating to a method of and apparatus for projecting an image on a screen
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US2051848A
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Projection system
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US2023420A
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Control system
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GB399931A
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Improvements in sound reproducing apparatus combined with an optical projection screen
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GB401700A
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Improvements in or relating to rear projection screens
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GB396714A
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Improvements in or relating to projection screens
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US2023970A
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Projection system and method
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US2016034A
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Projection system
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US1948972A
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Cover arrangement for a projection booth porthole
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DE642208C
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Screen for projection
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GB376801A
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Improvements in or relating to projector screens and method of preparing and treating the screen
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GB384988A
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Improvements in or relating to the method of and apparatus for feeding or pulling tape
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US2004583A
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Sound reproducing system
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