Of course again with most Office Supply artists, a big part of the work is taking common place items and in this case making a "little window into a different world." Information on John Kenn is pretty slim and sparse, but I managed to track down an interview with him over at My Modern Metropolis. It is about as much as you would expect from an art enthusiast blog, all about inspirations and what his current "real" job is. They wouldn't ask him a hard question like "What brands of adhesive notes are you using?" If anybody has a way to get in touch with John, I would also like to ask him he uses the ubiquitous BIC Round Stic as well to flush out the using Office Supplies theme.
It is obvious that he prefers to use the slightly less common rectangular Post-it notes and the blog title does say he uses Post-it notes so we'll assume he uses the proper 3M branded stuff. He does have some pieces that use a square Post-it note, but the most common stuff now is on a rectangular Post-it note. If you have a penchant for monsters in your office doodles you'll want to click that ghastly image above and check out his work. If the monsters were more cartoony and poorly drawn, surrounding notes about synergistic interactions, it would look like something from my regular meeting notes.