Sega Dreamcast, Nintendo Gamecube.Side note: Based on comments in the article, it seems the size of the logo is a maximum of 1mm w/h.
http://www.wired.com/gadgetlab/2011/04/gallery-silicon-art/?pid=1650
http://en.wikipedia.org/wiki/VMU#Technical_specifications
 

Sega Dreamcast, Nintendo Gamecube.

Side note: Based on comments in the article, it seems the size of the logo is a maximum of 1mm w/h.

http://www.wired.com/gadgetlab/2011/04/gallery-silicon-art/?pid=1650

http://en.wikipedia.org/wiki/VMU#Technical_specifications