Device for generating a gas stream containing a large number of ions of almost only one polarity.
DE496567C
Process for the qualitative and quantitative analysis of substances by radiation
DE497344C
Method for the quantitative analysis of substances of qualitatively known composition
DE537216C
Arrangement for converting alternating current into high voltage direct current
DE435004C
Device to make the changes in the wind currents perceptible on gliders by means of a sound that changes with them
DE534702C
Device for converting alternating current into high-voltage direct current, which consists of several similar, interconnected, individual rectifiers forming members
DE367709C
Method for the analysis of substances by X-ray radiation
DE537215C
Arrangement for converting alternating current into high voltage direct current
