4. Ships
  5. Spars

Douglas W. Lord

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Folding spinnaker pole system

Ships – Spars
Patent

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Helicopter remote control system

Education and demonstration – Vehicle operator instruction or testing – Flight vehicle
Patent

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Partially restrained arrangement for the mast and sail of a craf

Ships – Spars – Masts and masting
Patent

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Pivotable bulb mounted foil for sailboats

Ships – Watercraft with means used in providing sailpower – With hydrofoil for providing vertical lift to hull
Reexamination Certificate

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Profile ID: LFUS-PAI-P-632568

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