| http://www.w3.org/ns/prov#value | - Although such marker has been practical there is here presented a retroreflectant marker suitable to two way travel of vehicles therepast and more visible than the '256 patent and other prior art both in the general sense and in the sense that it stands out more clearly against a background which may be a melange of other lights forming a confusing background, and is better than the marker of the
|
