4. Chemistry: analytical and immunological testing
  5. Hemoglobin, myoglobin, or occult blood

Propper Manufacturing Co. Inc.

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Apparatus for charging a rechargeable battery

Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent

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Apparatus for controlling the illumination of optical examinatio

Illumination – Revolving
Patent

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Binocular indirect ophthalmoscope

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent

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Binocular ophthalmoscope

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent

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Compact prevacuum steam sterilizer test pack

Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Calorimeter
Patent

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