I think you might want to read the patent very closely. It describes in detail how they work. It is not intuitive. I fiddled with mine for a while before I figured it out. It will go both ways eventually.
To my knowledge there are none of these types of drivers that will only remove screws. There are several, however, that will only drive screws.
Probably the most notable is one made by the Decatur Coffin Co. that was marketed to undertakers.
North Bros. also made a right hand only model that was sold to manufacturers for use in assembling products. These are not real common as most of them got thrown out when they got worn.
By the way, welcome to ToolTalk. It is an excellent source of good information.
Mike