Light signal device

FIG. 1 is a top perspective view of a light signal device;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front plan view thereof;

FIG. 4 is a rear plan view thereof;

FIG. 5 is a right-side plan view thereof, the left-side plan view being a mirror-image of the right-side plan view;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines illustrate portions of the article that form no part of the claimed design.

We claim the ornamental design for a light signal device, as shown and described.

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Entry
References cited in office action of corresponding U.S. Appl. No. 16/004,987, dated Sep. 20, 2018.