4. Hydraulic and earth engineering
  5. Drainage or irrigation
  6. Porous or apertured pipe, flume, or tileway

Wayne D. Johnson

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Annular dosing capsule for electric discharge lamp and method of

Electric lamp and discharge devices – With frangible capsule containing getter – gas or vapor...
Patent

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Fluorescent lamp having uniquely configured container...

Electric lamp and discharge devices – Having pressure control of gas or vapor
Reexamination Certificate

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Septic tank drainage conduit structures

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

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Profile ID: LFUS-PAI-P-1691546

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