FIG. 1 is a top plan view of a dual allocation control button applied to a scientific instrument;
FIG. 2 is a top plan view of a second dual allocation control button applied to a scientific instrument;
FIG. 3 is a top plan view of a third dual allocation control button applied to a scientific instrument; and,
FIG. 4 is a top plan view of a fourth dual allocation control button applied to a scientific instrument.
No further views of the respective control button icons are provided, as all design aspects are visible in a top plan view.
The broken line showing of the scientific instrument is included for the purpose of illustrating unclaimed portions and forms no part of the claimed design.