Yes, we did make a couple.
The CrossLock River Rafter (180-RR) is a full-size, single bladed folder with a fully serrated Sheepsfoot (Sheepfoot?) blade. And the 180-D3 is a two-bladed verision with a regular drop pointe and a fully serrated Sheepsfoot.
As for fixed blade knives we made a Nighthawk with a fully serrated blade (655bx). Nasty!
IMHO I doubt that many people consider a fully serrated blade to be a 'knife' in the classic sense. But I for one am a fan of partial serrations which help in cutting dense materials, but also gives you a crisp knife blade to use.
Pete Q.