4. Hydraulic and earth engineering
  5. Drainage or irrigation
  6. Having regulation of flow through channel

Peter W. Gavin

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Casting riser pan

Static structures (e.g. – buildings) – With entrance for persons or objects in horizontal or... – With additional enclosure structure; e.g. – manhole
Reexamination Certificate

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Orifice shield for drainage pipe

Hydraulic and earth engineering – Drainage or irrigation – Having regulation of flow through channel
Reexamination Certificate

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Stackable riser and cover configuration

Static structures (e.g. – buildings) – With entrance for persons or objects in horizontal or... – With additional enclosure structure; e.g. – manhole
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2426127

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