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GB301730A
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Improvements in or connected with photographically recording sounds and pictures
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GB292063A
|
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Improved method of printing photographic records on a film
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GB292462A
|
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Improvements in or connected with picture projection and sound reproduction apparatus
|
|
GB289424A
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Improvements in or connected with the construction of cathodes for electric discharge devices
|
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GB290564A
|
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Improvements in or connected with talking motion picture apparatus
|
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GB287086A
|
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Improvements in or connected with slit blocks for talking motion picture photography
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GB284344A
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Improvements in or connected with projection screens
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GB284342A
|
|
Improvements in or connected with photo-electric cells
|
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GB297308A
|
|
Improvements in or connected with sound reproducing
|
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GB281280A
|
|
Improvements in or connected with motion picture screens
|
|
GB281248A
|
|
Improvements in or connected with the recording or reproducing of sound in talking cinematography
|
|
GB289419A
|
|
Improvements in or connected with talking motion picture films
|
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GB277314A
|
|
Improvements in or connected with combined picture projection and sound reproducing apparatus
|
|
GB277303A
|
|
Improvements in or connected with the reproduction of recorded sound
|
|
GB274118A
|
|
Improvements in or connected with sound recording and/or reproducing
|
|
GB273734A
|
|
Improvements in and relating to sound reproducing apparatus and the like
|
|
GB269140A
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|
Improvements in or relating to film feeding devices for use in talking motion picture recording and reproducing apparatus
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GB263180A
|
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Improvements in or relating to sound recording and reproducing apparatus
|
|
GB263181A
|
|
A method of and means for photographically recording sound
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GB245740A
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An improved sound controlled electric discharge lamp
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