Bry - this is all I could find on a patent search for Sims. Patent issued 2006. Limbless bow.

http://www.google.com/patents?id=Ph19AAAAEBAJ&printsec=abstract& zoom=4&dq=%22steven+c.+sims%22

Looks like Steven C. Sims holds over 20 patents - almost all of which are for vibration dampeners. He has one bow patent, the one listed above. At least that's what I got on google patent search.

Odd looking bow, that's for sure. No limbs, looks like a giant riser with cams on each end.