Appeal No. 2000-1333 Application No. 08/691,988 skill in the art “to employ in Adrian the profile[d] sheets being brazed together in pairs and the undulated sheet having a greater rolling depth than the corrugated sheet for the purpose of 8Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 NextLast modified: November 3, 2007