Swivel seat base

Description

FIG. 1 is a top plan view thereof;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and

FIG. 7 is a perspective view of a swivel seat base showing my new design; and,

FIG. 8 and FIG. 9 show the applications of the present invention.

In the drawings, the broken lines depict environmental subject matter only and form no part of the claimed design.

Claims

The ornamental design for a swivel seat base, as shown and described.