FIG. 1 is a right side elevational view of an in-line roller skate frame showing my new design, the broken line showing of the boot and wheels is for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a left side elevational view thereof, the broken line showing of the boot is for illustrative purposes only and forms no part of the claimed design;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a perspective view thereof;

FIG. 8 is a right side elevational view of an in-line roller skate frame showing a second embodiment of my new design;

FIG. 9 is a bottom plan view thereof;

FIG. 10 is a left side elevational view thereof;

FIG. 11 is a top plan view thereof;

FIG. 12 is a rear elevational view thereof;

FIG. 13 is a front elevational view thereof; and,

FIG. 14 is a perspective view thereof.