William H. Ryan

Process and apparatus for stretching continuous sheet materials

Method of stretching continuous materials such as sheeting and the like

Method of stretching plastic sheet material

Polarizing safe light

Process for preparing silver halide emulsions containing gelatin derivatives

Composite plastic sheet comprising a molecularly oriented polyvinyl alcohol layer and method of manufacture

Light-polarizing process and product

Light-polarizing film material and the process of preparation

Method of forming images of dichroic materials

Silver halide emulsions containing vinyl sulfone-gelatin derivatives