The ornamental design for a lock, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
1. Lock
2. Lock
1.1 : Perspective
1.2 : Front
1.3 : Back
1.4 : left=right=top=bottom view
2.1 : Perspective
2.2 : Front
2.3 : Back
2.4 : left=right=top=bottom view
The blurred blue parts shown in the drawings of design 1 illustrate parts which are not subject of the design claimed.