The ornamental design of a universalserialbus (USB) plug system, as shown and described.
This application is related to U.S. Utility patent application Ser. No. 14/670,395 titled Micro Universal Serial Bus (USB) Plug System and filed simultaneously herewith.
FIG. 1 is a front, top and left side perspective view of a universal serial bus (USB) plug system showing our new design;
FIG. 2 is a back, top and right side perspective view thereof;
FIG. 3 is a back elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a front elevational view thereof.
The broken line in the drawing represents unclaimed portion of the universal serial bus (USB) plug system and forms no part of the claimed design.