Ergonomic and functionally-efficient one-hand user input interface

FIG. 1 is a top perspective view of an ergonomic and functionally-efficient one-hand user input interface showing our new design;

FIG. 2 is a top plan view thereof.

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a left side elevational view thereof.

Broken lines (if any) showing the environment in any figures are for illustrative purposes only and form no part of the claimed design.