Patent
   D633157
Priority
Jan 12 2010
Filed
Jan 12 2010
Issued
Feb 22 2011
Expiry
Feb 22 2025
Assg.orig
Entity
unknown
18
20
n/a
The ornamental design for a muscular strengthening device, as shown and described.

FIG. 1 is a right elevation view of a muscular strengthening device showing my new design, the opposite side being a mirror image of the shown;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is an isometric view thereof.

Knapp, Adam C.

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