Locking device for a ladder

Description

1. Locking device for a ladder

1.1 : Perspective

1.2 : Perspective

1.3 : Front

1.4 : Back

1.5 : Left

1.6 : Right

1.7 : Top

1.8 : Bottom

1.9 : Perspective view shown in position of use

The parts and environmental structure shown by means of broken lines in the reproductions are not part of the claimed design.

Claims

The ornamental design for a locking device for a ladder, as shown and described.