Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Priority to DD17201773ApriorityCriticalpatent/DD106090A1/xx
Priority to HURO000778prioritypatent/HU170625B/hu
Publication of DD106090A1publicationCriticalpatent/DD106090A1/xx
Priority to DE19742427209prioritypatent/DE2427209A1/de
Priority to CS413874Aprioritypatent/CS175057B1/cs
Priority to SU2041222Aprioritypatent/SU553576A1/ru
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B27/00—Photographic printing apparatus
G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
G03B27/52—Details
G03B27/58—Baseboards, masking frames, or other holders for the sensitive material