3D Printing Pen

FIG. 1 is a rear, bottom, left hand perspective view of a 3D printing pen showing our design.

FIG. 2 is a rear, top, right hand 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 in the drawings are employed to show unclaimed portions of the 3D printing pen, and form no part of the claimed design.