The ornamental design for a massagechair, 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.
1. Massage chair
1.1: Front
1.2: Back
1.3: Left
1.4: Right
1.5: Top
1.6: Bottom
1.7: Perspective
Fig. 1is a front view of the design; fig. 2is a back view thereof; fig. 3is a left view thereof; fig. 4is a right view thereof; fig. 5is a top view thereof; fig. 6is a bottom view thereof; fig. 7is a perspective view thereof.