A woodworking machinery jig and fixture system includes a track which is or may be attached to a fence, a convex-concave curved flip stop and a base which mounts the stop to the track. The stop has a projecting portion which penetrates the plane of the fence so the stop isn't lifted by the point of a...http://www.google.com/patents/US6880442?utm_source=gb-gplus-sharePatent US6880442 - Woodworking machinery jig and fixture system
