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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Design Patent

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D0480097

CLAIM:
The ornamental design for a ideal cut diamond symmetry and proportion viewer, as shown.

REFERENCES:
patent: 3131593 (1964-05-01), Grow
patent: 3410635 (1968-11-01), Lockwood
patent: D271308 (1983-11-01), Leo
patent: 4776653 (1988-10-01), Kaplan
patent: D350163 (1994-08-01), Jones
patent: D351176 (1994-10-01), Agnew et al.
patent: 5469297 (1995-11-01), Marshall et al.
patent: 6305808 (2001-10-01), Ochi

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