The ornamental design for a licenseplateholder, as shown and described.
FIG. 1 is a left, front perspective view of the license plate holder, showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a right, rear perspective view thereof, shown in its position of use; and,
FIG. 9 is a top plan view shown with the fastening means in broken lines.
The broken line showing of the fastening means and wire in FIG. 1, the fastening means and bicycle in FIG. 8, and the fastening means in FIG. 9 is included for the purpose of illustrating environment and forms no part of the claimed design.