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

Leon H. Zimmerman

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Barrier fabric and method

Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Patent

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Geotextile having soil treatment compound and method

Chemistry: fertilizers – Processes and products – Forms or conditioning
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Highway edgedrain

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

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Profile ID: LFUS-PAI-P-323763

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