Manual cassette system for overhead projection transparencies

Manually-operated tray assembly for dispensing and receiving ove

Map reading apparatus

Mechanism for controlling the advance of a magazine in a transpa

Mechanism for transporting a slide from a long magazine into the

Microfiche card transport apparatus

Microfiche carrier

Mixed slide separator

Original conveying apparatus

Original feeding device

Overhead projector with automatic document positioner

Photo mounting equipment

Photographic slide magazine spring assembly

Photographic slide projector

Picture changer for large-scale picture projector

Projection apparatus

Projection mask storage and carrier system

Projection original film feeding apparatus

Projector control mechanism

Projector of reflection type