The ornamental design for a bipolar grasping forceps, as shown and described.
FIG. 1 is a top left side isometric view of a bipolar grasping forceps in accordance with the new design;
FIG. 2 is a left side isometric view thereof;
FIG. 3 is a right side isometric view thereof;
FIG. 4 is a top isometric view thereof;
FIG. 5 is a bottom isometric view thereof; and,
FIG. 6 is a front isometric view thereof.
The broken line shown in FIGS. 1, 3, 4, and 6 represent the bounds of the claimed design and form no part of the claimed design. The broken away symbols in FIGS. 1-5 indicate the appearance of any portion of the article between the break lines forms no part of the claimed design.