The ornamental design for an injection assist device, as shown and described.
The file of this patent contains at least one drawing executed in color. Copies of this patent with color drawings will be provided by the Patent and Trademark Office upon request and payment of the necessary fee.
FIG. 1 is a front and top perspective view of an injection assist device in accordance with our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a right side elevational view thereof, a left side elevational view being identical;
FIG. 4 is a front elevational view thereof; and,
FIG. 5 is rear elevational view thereof.
The bottom view of the injection assist device is not shown in the drawings nor described in the specification and, therefore, forms no part of the claimed design.
The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.