Apparatus for viewing gemstones

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

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1606

Patent

active

D04276175

REFERENCES:
patent: D357694 (1995-04-01), Kirkpatrick
patent: D371906 (1996-07-01), Peters
patent: D393367 (1998-04-01), Riddle
patent: 3936156 (1976-02-01), Shaw et al.
patent: 5260763 (1993-11-01), Yamashita
patent: 5446595 (1995-08-01), McFall

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