4. Plastic article or earthenware shaping or treating: apparatus
  5. Distinct means to feed, support or manipulate preform stock...
  6. Female mold type means

Fred D. Yocum

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Loudspeaker cone and method for making same

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Patent

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Method for making a loudspeaker cone with an integral surround

Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent

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Tool for molding a surround onto a loudspeaker cone

Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Female mold type means
Patent

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Profile ID: LFUS-PAI-P-896551

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