4. Plastic article or earthenware shaping or treating: apparatus
  5. Preform reshaping or resizing means: or vulcanizing means...
  6. Rod or tubular preform

Norman Ottmann

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Apparatus for making concrete pipe

Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Rod or tubular preform
Patent

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Method and apparatus for making concrete pipe

Plastic and nonmetallic article shaping or treating: processes – Treatment of material by vibrating – jarring – or agitating... – By reciprocating or vibrating mold
Patent

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Profile ID: LFUS-PAI-P-575395

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