Appeal No. 98-0599 Application 08/434,029 a magnetic member inserted into the recess portion of the transparent substrate, the magnetic member closing the center hole of the transparent substrate; wherein the annular rib has a top surface which is parallel to the second surface of the transparent substrate, and the annular rib has an outside diameter, 5Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 NextLast modified: November 3, 2007