I claim the ornamental design for the gas diffusion apparatus, as illustrated and described.
This application claims priority to and the benefit of U.S. patent application Ser. No. 13/875,012, filed May 1, 2013, entitled, “Gas Diffusion Apparatus for Liquid Aeration and Carbonated Liquids”.
FIG. 1 is a front perspective view of a gas diffusion apparatus for liquid aeration of the present disclosure;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof; and,
FIG. 4 is a bottom view thereof.
Any dashed lines in the drawings depict portions of the gas diffusion apparatus that form no part of the claimed design.
The gas diffusion apparatus is illustrated with symbolic break lines. The appearance of any portion of the article between the break lines forms no part of the claimed design.