4. Music
  5. Instruments
  6. Electrical musical tone generation

Youhei Nagai

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Imaging lens

Optical: systems and elements – Lens – Multiple component lenses
Reexamination Certificate

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Musical instrument tuned in nineteen note temperament scale

Music – Instruments – Electrical musical tone generation
Patent

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Zoom lens

Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1733836

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