The ornamental design for a keyboard for a medical ultrasonic observation device, as shown and described.
FIG. 1 is a front perspective view of a keyboard for a medical ultrasonic observation device showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is an enlarged view of area “7” identified by the dot-dash chain broken line in FIG. 2.
The broken lines illustrate portions of the keyboard for a medical ultrasonic observation device that form no part of the claimed design. The dot-dash chain broken line in FIG. 2 identifies area “7” of the keyboard for a medical ultrasonic observation device that is shown in enlarged view in FIG. 7 and forms no part of the claimed design.