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Light directing device having an elliptical reflecting face
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Automatic on-off control
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Light scanning system utilizing diffraction optics
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Stringed musical instrument with piezoelectric transducer providing gate control and music signals
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Conformal ear enclosure
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Character contour edger
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Periodic scan magnification for laser beam deflection
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Recording apparatus utilizing plane of polarization modulator
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Loudness level indicator
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Method and apparatus for simultaneously recording on film time displaced segments of an electrical signal
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Improvements in and relating to Picture Projection
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Recording apparatus and medium with discrete level modulation
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Memory plane
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Transconductance measurement
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