Bubble machine

Description

1. Bubble machine

1.1 : Front

1.2 : Back

1.3 : Left

1.4 : Top

1.5 : Bottom

1.6 : Perspective

1.7 : Perspective view in a using state

Mirror symmetry between the left view and the right view, omitting the right view; the broken lines illustrate portions of the bubble machine that form no part of the claimed design.

Claims

The ornamental design for a bubble machine as shown and described.