The ornamental design for the heat pipe, as shown and decribed.
FIG. 1 is a front elevational view of a preferred embodiment of a new
design for the heat pipe, the rear elevational view being identical
thereto, and the portion of the heat pipe depicted in broken lines being
no part of the design;
FIG. 2 is a top plan view of FIG. 1, and the bottom view being identical
thereto;
CORRECTIVE DOCUMENT TO RE-RECORD ASSIGNMENT PREVIOUSLY RECORDED AT REEL 026992 AND FRAME 0107 TO CORRECT THE ASSIGNEE S NAME TO QUANTUM TECHNOLOGY HOLDINGS LIMITED