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The ornamental design for a letter opener, substantially as shown and described. |
FIG. 1 is a perspective view of the letter opener showing our new design;
FIG. 2 is a front elevational view;
FIG. 3 is a left side elevational view;
FIG. 4 is a right side elevational view;
FIG. 5 is a top plan view;
FIG. 6 is a rear elevational view; and
FIG. 7 is a bottom plan view.
Costello, John C., Van Wagener, Raymond H., Power, John J., Pulos, Arthur J.
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May 16 1978 | Swingline Inc. | (assignment on the face of the patent) | / |
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