The ornamental design for a swivelchair, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a perspective view of a swivel chair showing the new design.
FIG. 2 is a front perspective view of the design shown in FIG. 1.
FIG. 3 is a rear perspective view of the design shown in FIG. 1.
FIG. 4 is a right-side perspective view of the design shown in FIG. 1.
FIG. 5 is a left-side perspective view of the design shown in FIG. 1
FIG. 6 is a top view of the design shown in FIG. 1; and,
FIG. 7 is a bottom view of the design shown in FIG. 1.