Muscle exerciser

The ornamental design for a muscle exerciser, as shown and described.

FIG. 1 is a front, right and top perspective view of a muscle exerciser, showing my design.

FIG. 2 is a rear, left and bottom perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines are for environmental structure, boundaries, or illustrative purposes only and form no part of the claimed designs to be patented.

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Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Jun 15 2020		Bin, Xu	(assignment on the face of the patent)
Dec 31 2020	ZHU, YUANWEN	XU, BIN	ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS	054946	0304	pdf

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