Helically wound lock-seam tube

The ornamental design for a helically wound lock-seam tube, as shown and described.

FIG. 1 is a perspective view of a helically wound lock-seam tube, showing my new design as seen obliquely from the side; and,

FIG. 2 is an end view of the helically wound lock-seam tube.

Patent	Priority	Assignee	Title
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Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Mar 06 1995	LENNARTSSON, KENNETH	PROTOL A G	ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS	007393	0871	pdf
Mar 08 1995		Protol A.G.	(assignment on the face of the patent)
Feb 22 2011	PROTOL A G	Spiro SA	ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS	026364	0567	pdf

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