4. Firearms
  5. Indicators

William W. Seifert

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Ferrographic apparatus

Liquid purification or separation – Magnetic
Reexamination Certificate

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Ferrographic method

Liquid purification or separation – Processes – Using magnetic force
Patent

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Firearm wear analysis

Firearms – Indicators
Patent

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Flow unit for ferrographic analysis

Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Transparent
Patent

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Optical determination of amount of soot in oil sample

Optics: measuring and testing – Oil testing
Patent

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Profile ID: LFUS-PAI-P-112786

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