The ornamental design for a one-piece corner post, as shown and described.
This application is related to U.S. utility application Ser. No. 09/934,413 of Robert David Shaw entitled "Ornamented Corner Post" filed in the U.S. Patent and Trademark on the same day as the filing of this application.
FIG. 1 is a perspective view of a one-piece corner post, shown fragmented indicating indefinite length, for covering a corner of a structure;
FIG. 2 is a top plan view of the one-piece corner post;
FIG. 3 is a right side, front elevational view of the one-piece corner post, the left side, front elevational view being a mirror image thereof; and,
FIG. 4 is a left side, rear elevational view of the one-piece corner post, the right side, rear elevational view being a mirror image thereof.