Improvements introduced in devices integrated by the combination of a first binding element and a sheet that has an exhibition area and two opposite side margins. (Machine-translation by Google Translate, not legally binding)
GB1379520A
Projection of transparencies
ES383592A1
A shuttering device for projecting a slide on a projector on a screen. (Machine-translation by Google Translate, not legally binding)
ES337380A1
A storage device and accessory slideshow exhibition. (Machine-translation by Google Translate, not legally binding)
ES327326A1
Device for projecting on a screen one or more images from a slideshow package. (Machine-translation by Google Translate, not legally binding)
GB871507A
Improvements in the preparation of drawings, diagrams and the like
