Means of reducing radiation in a mobile phone earpiece by the use of ferrite beads
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LED light source with two vertically-stacked LEDs of different colours
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LED light source
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Matrix display device using movable vanes - has mirror on vanes reflecting light from lamp in front of display board and second lamp is situated behind board
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Matrix display device using movable vanes - has mirror on vanes reflecting light from lamp in front of display board and second lamp is situated behind board
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Information display device
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Automatic electronic switching device - enables selective signal transmission in both directions between first and second signal terminal
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Electronic switching circuit for bidirectional transfer
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Means for developing electric signals representative of alphanumeric characters
