Ruler

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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D0571239

CLAIM:
The ornamental design for a ruler, as shown and described.

REFERENCES:
patent: D317575 (1991-06-01), Ramsey
patent: D342210 (1993-12-01), Grossman
patent: D393221 (1998-04-01), McConahay
patent: 6134798 (2000-10-01), Duncan et al.
patent: D510286 (2005-10-01), Manning
patent: D515442 (2006-02-01), Robbins, III

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