I recall seeing a new product in Model Railroad News a while back for a rerailer that is placed between the rails of existing track, not a 9" sectional track rerailer. I gave away my back issues and cannot locate the product. Anyone with a better memory than be?
That’s an interesting patent (I assume that’s what the OP meant rerailer) but it sure looks like it could be contructed in much the same way a bridge protection rerailer is made on prototype roads with some scrap styrene and few lengths of leftover rail.