The ornamental design for a fingergrippingdevice for a writing instrument, as shown and described.
FIG. 1 is a front elevational view of a finger gripping device for a
writing instrument according to the present invention, the rear, right and
left sides being mirror images of the front side;
FIG. 2 is a top plan view of the finger gripping device of FIG. 1;
FIG. 3 is a bottom plan view of the finger gripping device of FIG. 1; and,
FIG. 4 is a perspective view of the writing instrument provided with the
finger gripping device of FIG. 1.
The broken line showing of the writing instrument structure in FIG. 4 is
for illustrative purposes only and forms no part of the claimed design.