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Marie Louise Killick (in some sources Maria) (1914 Mitcham, Surrey - (1964 Guildford, Surrey, England) was an English audio engineer who patented the truncated-tip sapphire stylus in 1945 for playing gramophone records.Following the re-instatement of her patent, she was involved from 1953 in a lawsuit against Pye Ltd. (Killick v Pye Ltd) for their infringement of her patent. Killick won the suit in The High Court of Justice 1957.

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  • Marie Louise Killick (in some sources Maria) (1914 Mitcham, Surrey - (1964 Guildford, Surrey, England) was an English audio engineer who patented the truncated-tip sapphire stylus in 1945 for playing gramophone records.Following the re-instatement of her patent, she was involved from 1953 in a lawsuit against Pye Ltd. (Killick v Pye Ltd) for their infringement of her patent. Killick won the suit in The High Court of Justice 1957.
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  • Killick, Marie
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  • English studio Engineer, inventor of a sound reproducing stylus manufactured under the trade name of Sapphox and protected by Letters Patent 606309 granted in 1945 - lapsed for a period (1950-1953) reinstated late 1953. Pye Radio sued for infringement of Letters Patent. Judgement awarded in Marie Killick's favour in 1957, Pye appealed but the Appeal Court upheld the lower court's judgement in Marie's favour.
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  • Maria
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