The ornamental design for a portableoffice in-a-box, as shown and described.
FIG. 1 illustrates a front left-side top perspective view of a portable office in-a-box;
FIG. 2 illustrates a rear left-side bottom perspective view thereof;
FIG. 3 illustrates a front view thereof;
FIG. 4 illustrates a rear view thereof;
FIG. 5 illustrates a left-side view thereof;
FIG. 6 illustrates a right-side view thereof;
FIG. 7 illustrates a top view thereof;
FIG. 8 illustrates a bottom view thereof;
FIG. 9 illustrates a front left-side top perspective view of the portable office in-a-box in an open position;
FIG. 10 illustrates another front left-side top perspective view of the portable office in-a-box in the open position;
FIG. 11 illustrates a rear left-side perspective view of the portable office in-a-box in the open position; and,
FIG. 12 illustrates a rear bottom right-side perspective view of the portable office in-a-box in the open position.
The broken line showing of portions of the portable office in-a-box in FIGS. 1-3 and FIGS. 7-11, and articles inside the portable office in-a-box shown in FIG. 9 are for the purpose of illustrating environmental structure and form no part of the claimed design.