4. Measuring and testing
  5. Frictional resistance, coefficient or characteristics

William English

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Door bell junction box

Electricity: conductors and insulators – Boxes and housings
Reexamination Certificate

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Horizontal pull slipmeter

Measuring and testing – Frictional resistance – coefficient or characteristics
Patent

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Positional control device for sectional doors

Flexible or portable closure – partition – or panel – Automatic control – With starting or driving means
Reexamination Certificate

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Tribometer

Measuring and testing – Frictional resistance – coefficient or characteristics
Patent

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Profile ID: LFUS-PAI-P-862564

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