Protecting Trade Dress in Once-Patented Subject Matter

The recent decision, <i>Fuji Kogyo Co. v. Pacific Bay Int'l, Inc.</i>, 461 F.3d 675 (6th Cir. 2006), confronts the question deliberately left unresolved in <i>TrafFix Devices, Inc. v. Marketing Displays, Inc.</i>, 532 U.S. 23 (2001), of whether a product design claimed in a prior utility patent can ever be protectable trade dress under the Lanham Act. Although setting a high bar to protectability, indeed a 'presumption' and 'heavy burden' that material claimed in a utility patent is functional and hence unprotectable once the patent term ends, the Supreme Court, of course, expressly elected not to foreclose such protection entirely. Thus, it refused the invitation of defendant TrafFix, and 'some of its amici,' to rule that 'the Patent Clause of the Constitution, Art. I '8, cl. 8, of its own force, prohibits the holder of an expired utility patent from claiming trade dress protection.' 532 U.S. at 35. Without itself addressing the constitutional question of how narrowly 'limited times' means 'limited times,' <i>Fuji Kogyo</i> does nothing to ease the burden in establishing trade dress protection for once-patented subject matter; it offers as well a new (if, perhaps, less than fully developed) analytical approach for applying the <i>TrafFix</i> presumption, asking whether the claimed trade dress would have infringed the expired patents.