SWN Formula logo Posted on June 26, 2015 by admin SWN Formula logo Sign - Symbol - Watermark - Trademark - Company logo. The below image is of the SWN Formula logo showing the sign by itself or the logo including the brand name of the relevant organization. SWN Formula logo Tags: swn formula, swn formula brand, swn formula logo, swn formula logos, swn formula sign, swn formula symbol, swn formula trademark