Oil piston damper

The ornamental design for an oil piston damper, as shown and described.

FIG. 1 is a front view of an oil piston damper showing my new design, a rear view being symmetrical to the front view;

FIG. 2 is a plan view thereof, a bottom view being same as the plan view;

FIG. 3 is a left side view thereof; and,

FIG. 4 is a right side view thereof.

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Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Feb 04 2005	TOMIJI, KATSUYASU	NIFCO INC	ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS	016269	0864	pdf
Feb 08 2005		Nifco Inc.	(assignment on the face of the patent)

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