Paving stone

Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified

Design Patent

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Design Patent

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D0521592

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

REFERENCES:
patent: D389926 (1998-01-01), Barth et al.
patent: D425628 (2000-05-01), Barth et al.
patent: D431305 (2000-09-01), Barth et al.
patent: D485370 (2004-01-01), Schmitz et al.
patent: D498543 (2004-11-01), Schmitz et al.

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