FIG. 1 is a rear perspective view of a portable seat design according to a first embodiment;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof, opposite the view of FIG. 2;
FIG. 4 is a left elevation view thereof;
FIG. 5 is a right elevation view thereof, opposite the view of FIG. 4;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof, opposite the view of FIG. 6;
FIG. 8 is a rear perspective view of a portable seat design in an alternative position according to a first embodiment;
FIG. 9 is a front elevation view thereof;
FIG. 10 is a rear elevation view thereof, opposite the view of FIG. 9;
FIG. 11 is a right elevation view thereof;
FIG. 12 is a left elevation view thereof, opposite the view of FIG. 11;
FIG. 13 is a top plan view thereof;
FIG. 14 is a bottom plan view thereof, opposite the view of FIG. 13;
FIG. 15 is a rear perspective view of a portable seat design according to a second embodiment;
FIG. 16 is a front elevation view thereof;
FIG. 17 is a rear elevation view thereof, opposite the view of FIG. 16;
FIG. 18 is a left elevation view thereof;
FIG. 19 is a right elevation view thereof, opposite the view of FIG. 18;
FIG. 20 is a top plan view thereof;
FIG. 21 is a bottom plan view thereof, opposite the view of FIG. 20;
FIG. 22 is a rear perspective view of a portable seat design in an alternative position according to a second embodiment;
FIG. 23 is a front elevation view thereof;
FIG. 24 is a rear elevation view thereof, opposite the view of FIG. 23;
FIG. 25 is a right elevation view thereof;
FIG. 26 is a left elevation view thereof, opposite the view of FIG. 25;
FIG. 27 is a top plan view thereof; and,
FIG. 28 is a bottom plan view thereof, opposite the view of FIG. 27.
The dashed broken lines are included for the purpose of illustrating environment of the design only, and form no part of the claimed design.