Wrench type spanner

Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning

Design Patent

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Design Patent

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D0506371

CLAIM:
The ornamental design for a wrench type spanner, as shown and described.

REFERENCES:
patent: 1793714 (1931-02-01), Newberg
patent: 5172614 (1992-12-01), Monnet et al.
patent: D338379 (1993-08-01), DePalo
patent: 5865074 (1999-02-01), Hsieh
patent: D441625 (2001-05-01), Chen
patent: D481276 (2003-10-01), Hu
patent: D499619 (2004-12-01), Hsien
Snap-on Catalog, p. 168, 1994.

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