Optical instrument

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric

Design Patent

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Design Patent

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D0509763

CLAIM:
The ornamental design for an optical instrument, as shown and described.

REFERENCES:
patent: D235318 (1975-06-01), Kooi
patent: D235319 (1975-06-01), Kooi
patent: D235375 (1975-06-01), Kooi et al.
patent: D235524 (1975-06-01), Kooi et al.
patent: D235525 (1975-06-01), Kooi et al.
patent: D333276 (1993-02-01), Donn
patent: D386993 (1997-12-01), Fujii et al.

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