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US1697021A
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Alternating-current arc lamp with inclosed arc
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US1778665A
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Manufacture of resistor rods with thickened portions
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DE429388C
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Process for the manufacture of electrodes for electric ovens
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DE430843C
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Process for the production of liquid meters according to the tilting drum principle for acids etc.
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DE461094C
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Carbon electrode for electric ovens
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US1671469A
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Electric resistance
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DE418140C
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Electrically heated oven for rapid heating of rod-shaped bodies
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DE451716C
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Process for the production of bodies from silicon carbide
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DE444741C
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Method of improving dynamo brushes by soaking after forming and getting ready
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DE455347C
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Resistance made of silicon or similar material
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DE438065C
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Process for the production of bodies from silicon carbide
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DE393502C
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Resistance mass heating rod
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DE435846C
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Remote indicator for liquid meter based on the tilting drum principle
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DE466515C
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Process for the production of finely divided copper of high plasticity
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DE467843C
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Process for the production of molded bodies from copper
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DE411207C
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Process for the production of carbon electrodes
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DE389307C
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Electric water heater
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DE410916C
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Method for purifying zirconium oxychloride
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DE396788C
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Manufacture of vessels with high chemical resistance
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DE421951C
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Process for the manufacture of bodies containing silicon and carbon
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