Please, take the context into account: like most patents, the bow concept mixes several know elements (concave TE, sweep, bridles along the LE only, negative dihedral...) I think there isn't one new invention that starts from nothing.
Than, is this sweep would be one of the element showing on the L.E.
also of the ParaskiFlex?:?:
Or it doesn't apply because of the rigid L.E.?:?:
I'd like to comment about L/D.
I experienced long time ago when double surface was made functional for hang-gliders,
it was a quantum leap forward in hang gliding.
From 7:1 rapidly increased over 10 with better profiles and aerodynamics.
Don't you feel after a point only double surface and rigidity will be the goal of he future?:?: