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Step-by-step drive useful in microfiche cameras
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Reeling apparatus with dynamic vibration absorber
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Heat developable diazotype photoprinting materials
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Diazotype photoprinting materials
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Diazotype photoprinting materials and methods of use
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Microimage reader
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Base film with improved scribe coating and photosensitive coating applied thereon
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Film strip reeling apparatus
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Projector viewer and image scanning assembly therefor
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Apparatus for making prints
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Temperature responsive apparatus
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Photosensitive compositions comprising acid addition salts of substituted leucocyanide triphenylmethane dyes and metal perchlorates
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Diazotype reproduction material
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Diazotype material comprising a metal sulfate nitrogenous compound and polymeric anhydride
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Process of making and using thermographic reproduction paper
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Apparatus for making prints
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Projector viewer and image scanning assembly therefor
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Thermographic reproduction paper and method of using
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Projector viewer
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Thermographic reproduction apparatus with thermosensitive heat regulator
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