4. Plastic article or earthenware shaping or treating: apparatus
  5. Preform reshaping or resizing means: or vulcanizing means...
  6. Including both heating and cooling means

Bernard Rottman

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Apparatus for producing molded plastic articles

Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including both heating and cooling means
Patent

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Process for producing molded plastic articles

Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Using sonic – supersonic – or ultrasonic energy
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1979913

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