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Robert C. Schwartz

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Audio-time plotting equipment and method

Patent

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Audio-visual slide projection system

Optics: image projectors – With sound accompaniment
Patent

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Battery saving radio circuit and system

Telecommunications – Transmitter and receiver at separate stations
Patent

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Bottom for lint feeder housing

Presses – Methods
Patent

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Desktop smartcard security kit

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Lost child or person locator
Patent

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Profile ID: LFUS-PAI-P-497469

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