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- 23502757a8525e1a44fabbe063ba1379b859bcdf875ae606144d1d892b8f3b6b countryCode United_States_Patent_Office.
- 23502757a8525e1a44fabbe063ba1379b859bcdf875ae606144d1d892b8f3b6b description ":A device for determining definitely the amount of time required to expose the printing paper for various negatives, all of which may have different densities".
- 23502757a8525e1a44fabbe063ba1379b859bcdf875ae606144d1d892b8f3b6b inventorFirst "Cedric".
- 23502757a8525e1a44fabbe063ba1379b859bcdf875ae606144d1d892b8f3b6b inventorLast "Wright".
- 23502757a8525e1a44fabbe063ba1379b859bcdf875ae606144d1d892b8f3b6b isCitedBy Cedric_Wright.
- 23502757a8525e1a44fabbe063ba1379b859bcdf875ae606144d1d892b8f3b6b issueDate "1935-12-03".
- 23502757a8525e1a44fabbe063ba1379b859bcdf875ae606144d1d892b8f3b6b patentNumber "2023159".
- 23502757a8525e1a44fabbe063ba1379b859bcdf875ae606144d1d892b8f3b6b title "Photographic apparatus".