Portable personal corona discharge device for destruction of air

Positive acting photoresist comprising diazide ester, novolak re

Positive image forming radiation sensitive compositions containi

Positive images in photothermographic materials containing nitro

Positive or negative developable photosensitive composition

Positive process using a low coating weight silver halide

Positive resist for high energy radiation

Positive resists containing dimethylglutarimide units

Positive working thermally stable photoresist composition, artic

Positive-acting diazo type materials having photodecomposed grad

Positive-working immobile photographic compounds which cleave by

Positive-working photographic process and radiation elements uti

Powder charging apparatus

Pre-ionizer for use with an electrostatic precipitator

Pre-sensitized lithoprinting plate requiring no fountain solutio

Precipitating tube bundle for wet electrofilters

Precipitator

Precipitator for an electrostatic filter

Precipitator for cleaning of air from electrically charged aeros

Preparation for the processing of photographic materials