Like a full stop, a question mark indicates the end of a sentence.

The exclamation mark indicates a click.

Each mark indicates the edge of the safe water channel in terms of port (left-hand) or starboard (right-hand).

The logo/mark indicates that the products have strong efficacies as sanitizers, residual self-sanitizing efficacies after multiple wet-dry cycles, and continuous reductions of bacterial contaminants.

In regard to time, a single hatch mark indicates minutes and a double hatch mark indicates seconds; these typically occur following hours, indicated by an elevated circle.