Slotted hex washer screw head

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

Design Patent

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Details

Type

Design Patent

Status

active

Patent number

D0524638

Description

CLAIM:
The ornamental design for a slotted hex washer screw head, as shown and described.

REFERENCES:
patent: D374814 (1996-10-01), Saito
patent: D418048 (1999-12-01), Chan
patent: 6174118 (2001-01-01), Rebers et al.
patent: D459207 (2002-06-01), Miyata
patent: D464253 (2002-10-01), Nimberger et al.
patent: D482957 (2003-12-01), Lajeunesse et al.

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