Air cleaner

Apparatus for separating aerosols or particles from gases

Color photographic light-sensitive material

Direct positive photographic elements containing developers

Direct positive silver halide photographic materials

Direct-positive silver halide emulsions having incorporated deve

Discharge device and air purifier

Dust precipitation from air by negative ionization

Electric dust collecting apparatus and manufacturing method...

Facility for improving environmental atmosphere of interior...

Flotage trapping device and flotage repelling device

Light-sensitive material having developers embedded therein

Negative ion generator

Photographic element and process for developing

Photographic element with contiguous layer containing an oxidizi

Photosensitive material for color photography

Silver halide photographic emulsion sensitized with a mixture of

Silver halide photographic material

Sulfur-substituted isothioureas in silver halide emulsions

Synthetic polymer latices in photographic silver halide emulsion