4. Metal working
  5. Method of mechanical manufacture
  6. Electrical device making

Hirofumi Yanagawa

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Line source speaker system

Electrical audio signal processing systems and devices – Having non-electrical feature – And loudspeaker
Patent

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Method and apparatus for erasing acoustic echo

Electrical audio signal processing systems and devices – Dereverberators
Patent

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Method of making a rectangular nickel-metal hydride secondary ce

Metal working – Method of mechanical manufacture – Electrical device making
Patent

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Method of manufacturing a nickel-metal hydride secondary cell

Metal working – Method of mechanical manufacture – Electrical device making
Patent

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Rectangular nickel-metal hydride secondary cell

Chemistry: electrical current producing apparatus – product – and – Means externally releasing internal gas pressure from closed... – Elastic – resilient or spring biasing valve means
Patent

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Profile ID: LFUS-PAI-P-422809

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