4. Geometrical instruments
  5. Area integrators
  6. Electrical

David O'Connor

Inventor

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Metric gauge

Geometrical instruments – Area integrators – Electrical
Patent

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Rotating amusement device

Undertaking
Patent

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Snare drum practice pad

Musical instruments – Percussion instrument
Patent

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Zero cooling air flow overfire air injector and related method

Ventilation – Having outlet airway – Having readliy movable air regulating louver – damper – or cover
Reexamination Certificate

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Profile ID: LFUS-PAI-P-905380

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