4. Measuring and testing
  5. Instrument proving or calibrating
  6. Roughness or hardness

Dan Frusescu

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Calibration disk having discrete bands of calibration bumps

Measuring and testing – Instrument proving or calibrating – Roughness or hardness
Patent

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Method of forming a magnetic hard disk with elliptical...

Coating processes – Direct application of electrical – magnetic – wave – or... – Pretreatment of substrate or post-treatment of coated substrate
Reexamination Certificate

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Patterned laser zone texture

Electric heating – Metal heating – By arc
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1148525

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