DE1924257A1
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Apparatus for electrophotography
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DE1900028A1
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Method and apparatus for electrophotography
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DE1797420A1
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Microfilm viewer
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GB1246968A
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Improvements in or relating to support means for optical projection systems
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DE1561133A1
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Device for removing individual sheets of paper or the like. from the stack of sheets of a magazine
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GB1087721A
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Imaging lens system
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GB1122231A
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Improvements in document-copying apparatus
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GB1122232A
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Improvements in document-copying apparatus
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US3323012A
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Superposed high frequeny starting circuit for discharge lamp
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DE1226411B
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Device for automatic focusing for a magnifying device
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GB1040743A
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Improvements in electrically heated rollers
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GB995908A
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Improvements in circuit arrangements for operating gas discharge lamps
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GB1036105A
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Improvements in lens focussing systems and means for moving lens means of an opticalprojection system
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GB1033882A
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Improvements in mountings for adjusting the location of a source of light in an optical path
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GB970322A
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Improvements in or relating to microfilm enlargers
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GB970321A
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Improvements in or relating to microfilm enlargers
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GB944411A
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Improvements in photographic type composing apparatus and methods
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GB941604A
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Improvements relating to photographic type-composing apparatus
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GB940382A
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Improvements in or relating to photographic type composing apparatus
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GB936290A
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Optical justifying means
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