The ornamental design for a sock, as shown and described.
1.1 : Front
1.2 : Left
1.3 : Right
1.4 : Top
1.5 : Bottom
1.6 : is a cross-sectional view along the line 1.6-1.6 as indicated in 1.4;
1.7 : is an enlarged partial cross-sectional view along the line 1.7-1.7 as indicated in 1.4;
1.8 : is an enlarged partial cross sectional view along the line 1.8-1.8 as indicated in 1.4;
1.9 : is an enlarged partial cross sectional view along the line 1.9-1.9 as indicated in 1.4;
1.10 : is an enlarged partial cross sectional view along the line 1.10-1.10 as indicated in 1.4;
1.11 : is an enlarged partial cross-sectional view along the line 1.11-1.11 as indicated in 1.4.
The subject article is a right sock having an elastic non-slip part at a part to make contact with the arch of foot of a wearer wearing the article. The left sock is a mirror image of the article. The missing rear view is a mirror image of 1.1.
The evenly dashed broken lines depict portions of a sock and form no part of the claim. The unevenly dashed lines with arrows in fig. 1.4 depict the cut line and direction of the cross sectional views and form no part of the claim.