Devices for changing pictures in viewing apparatus or projectors

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: PHYSICS
Class:: PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
Subclass:: 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

picture pictures Any flat representation, whether transparent or not, e.g. produced by photography, writing, or printing

photographic SLIDE(S) -changing devices in projectors

4 direct subcodes

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G03B 23/02 in which pictures are removed from, and returned to, magazines; Magazines therefor
G03B 23/08 in which pictures are attached to a movable carrier
G03B 23/14 Carriers operable to move pictures into, and out of, the projection or viewing position and carrying one or two pictures only in a removable manner
G03B 23/18 with fade-in and fade-out effects

Top 10 applicants by patent filingsfor class G03, 2013–2023, worldwide · Source: EPO PATSTAT