Rigid plastic joint for vertical walls

The ornamental design for a rigid plastic joint for vertical walls, as shown.

FIG. 1 is a perspective view of a rigid plastic joint for vertical walls showing my new design;

FIG. 2 is a right side elevational view, the left side being a mirror image thereof;

FIG. 3 is an end elevational view thereof; and

FIG. 4 is a top plan view, the bottom being a mirror image thereof.

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Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Nov 29 1988	ALCAZAR, BERNARDINO B	VICASA, S A	ASSIGNMENT OF ASSIGNORS INTEREST	005039	0115	pdf
Feb 03 1989		Vicasa, S.A.	(assignment on the face of the patent)

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