Development promoting compounds for silver halide photography

Device for accumulating aerosols from gases

Device for air cleaning

Device for air cleaning

Device for air cleaning

Device for separating from a gas stream liquids and/or solid...

Device for the transport of materials and electrostatic precipit

Diffusable dye-releasing compounds which are cleavable upon oxid

Diffusion transfer elements comprising U V light absorbers

DIR coupler that forms colorless reaction product

Direct positive emulsions containing fogged, monodispersed silve

Direct-positive photographic emulsion containing, unfogged, mono

Direct-positive process utilizing a supersensitized silver halid

Direct-positive silver halide emulsion fogged to low level and t

Direct-positive silver halide emulsions

Disc-type air filters

Discharge gas purification system

Dispersing polymeric particles in aqueous medium for coating sil

Dry copying material

Dry stabilization of a silver halide photographic material