4. Acoustics
  5. Diaphragm
  6. Critically defined material or coating

Hirotoshi Niguchi

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Acoustic diaphragm with polyurethane elastomer coating

Acoustics – Diaphragm – Critically defined material or coating
Patent

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Erasable optical disk media and method of recording/erasing the

Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent

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Speaker diaphragm and method of preparation of the same

Acoustics – Diaphragm – Critically defined material or coating
Patent

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Speaker diaphragm molded from poly-biphenol phthalate type resin

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent

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Profile ID: LFUS-PAI-P-444503

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