The ornamental design for a sphygmomanometer, as shown and described.
FIG. 1 is a front perspective view of a sphygmomanometer showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a left side elevational view thereof;
FIG. 8 is a front perspective view thereof with an armband shown in an opened position; and,
FIG. 9 is a right side elevational view thereof with the armband shown in an opened position.
The broken lines in the drawing views are included for the purpose of illustrating portions of the sphygmomanometer that form no part of the claimed design.
The net shading appearing in FIGS. 1, 2, 4 and 8 represents fabric and is understood to extend uniformly throughout the area represented.