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Method and apparatus for focusing the picture of an object on an image plane
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Process and apparatus for developing photographic bases
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Process and apparatus for determination of the exposure time
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Method and device for the measurement of light
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Filter arrangement for a photographic colour enlarging or copying apparatus
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Light meter with filters and transducer shutter - coordinates filter movement, by integral assembly of disc with contact zones for switching
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Light measuring apparatus
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Circuit for the control of exposure time in photographic enlarging equipment
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Illumination device with a light guiding box for photographic enlargers with a film holder rotatable in its plane
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Illuminating system for color enlargement or copying equipment
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Copier combined with projection unit - has daylight viewing facility with option to photocopy viewed picture
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Exposure device for colour enlarging or copying apparatuses
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LIGHTING DEVICE FOR A PHOTOGRAPHIC COLOR ENLARGEMENT OR COPIER
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LIGHTING DEVICE FOR COLOR ENLARGEMENT OR COPY DEVICES
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MEASURING DEVICE FOR DETERMINING THE COLOR COMPOSITION OF THE COPY LIGHT IN PHOTOGRAPHIC ENLARGEMENT DEVICES
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LIGHTING DEVICE WITH A LIGHT MIXING CHAMBER, IN PARTICULAR FOR PHOTOGRAPHIC ENLARGEMENT OR COPY DEVICES
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MEASURING DEVICE FOR DETERMINING THE COLOR COMPOSITION OF THE COPY LIGHT IN PHOTOGRAPHIC ENLARGEMENT DEVICES
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Photographic enlarging apparatus with hinged image holder
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Light measuring circuit for a photometer
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Illuminating equipment for a photographic enlarging or copying apparatus
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