4. Music
  5. Instruments
  6. Stringed

John A. Decker, Jr.

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Automatic sextant

Geometrical instruments – Straight-line light ray type – Celestial
Patent

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Automatic sextant

Geometrical instruments – Straight-line light ray type – With telemetric means
Patent

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Composite-materials acoustic stringed musical instrument

Music – Instruments – Stringed
Patent

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Composite-materials acoustic stringed musical instrument

Music – Instruments – Stringed
Patent

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Elevation-angle sensing, celestial navigation and surveying

Optics: measuring and testing – Angle measuring or angular axial alignment – Apex of angle at observing or detecting station
Patent

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Profile ID: LFUS-PAI-P-812426

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