Walter H. Schottky (1886-1976) was a German physicist who invented the screen-grid vacuum tube in 1915 and the tetrode in 1919 while working at Siemens. In 1938, Schottky formulated a theory predicting the Schottky effect, now used in Schottky diodes.
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... for females. The per capita income for the village is $25,682. 5.5% of the population and 4.0% of families are below the poverty line. Out of the total people ...