4. Photography and optical equipment
  5. Optical article not elsewhere specified
  6. Lens or objective

David Alan Weir

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Ideal cut diamond symmetry and proportion viewer

Photography and optical equipment – Optical article not elsewhere specified – Lens or objective
Design Patent

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Viewer for laser-inscribed diamonds

Optical: systems and elements – Lens – With viewed object or viewed field illumination
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2602913

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