Siemens Aktiengesellschaft

Hans Kohlmuller

Waldemar Nippe

The invention relates to a transparent display material having a conducting layer of a tin oxide and/or indium oxide composition which withstands electrochemical attacks without the need for elaborate measures. To this end, the invention provides that the conducting layer contains at least one metal of the Ib and/or eighth transition metal group with a content of from about 10.sup.-3 to 3% by weight, relative to tin oxide and/or indium oxide. The conducting layer according to the invention is particularly well suited for use in liquid-crystal displays.

Transparent conducting layer

A fuel cell battery of the filter press-type which uses a liquid electrolyte and at least one gaseous reactant, with the individual fuel cells which make up the battery having gas and electrolyte chambers separated from each other by asbestos diaphragms with the asbestos diaphragms having electrolyte-impermeable, gas-tight outer zones of increased thickness which are pressed together or against separator sheets and contain supply ducts formed therein, in which the width of the outer zone of increased thickness on the electrolyte side is made smaller than the width of the same part on the gas side and where the means such as a support frame or electrode causing separation in the electrolyte chamber are sized to extend beyond the inner edge of the outer zone on the gas side.

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Erlangen, Germany

Hans Kohlmuller