4. Music
  5. Accessories

John R. Davidson

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Brass instrument improvement

Music – Instruments – Wind
Patent

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Brass instrument improvement

Music – Accessories
Patent

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Error correction method and apparatus for electronic timepieces

Horology: time measuring systems or devices – Regulating means – For adjusting the frequency or beat
Patent

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Tire tread

Transportation – Tire – With tread pattern
Design Patent

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Profile ID: LFUS-PAI-P-826986

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