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Disc drive linear actuator and control system therefor
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Moving coil motor with no stray flux
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Vibration damped transducer head assembly
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Head loading system for magnetic memory disk drives
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Apparatus for recovery of recorded bit information on a magnetic recording medium
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Magnetic memory disk drive apparatus with reduced r. f. noise
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Apparatus for controlling the relative position between two relatively movable members
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Air circulation apparatus
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Speed control system having high and low level speed means
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