4. Metal deforming
  5. By use of roller or roller-like tool-element
  6. Roller or roller-like tool-element of particular configuration

Roy Humpage

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Drainage grate

Hydraulic and earth engineering – Drainage or irrigation – Porous or apertured pipe – flume – or tileway
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Drainage grate assembly

Road structure – process – or apparatus – Drain or gutter
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Sheet material

Metal deforming – By use of roller or roller-like tool-element – Roller or roller-like tool-element of particular configuration
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2251586

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