Monthly Archives: February 2009

Design Patents after Egyptian Goddess: The Comeback Kid

By Vincent J. Allen

In 1871, the Supreme Court established the standard for proving design patent infringement in Gorham Manufacturing Company v. White.The design patent in Gorham covered the ornamental features of forks and tablespoons. The Supreme Court explained that the appearance of an article may increase its “salable value.”  The test of identity of design “must be sameness of appearance, and mere differences of lines in the drawing or sketch . . . or slight variances in configuration . . . will not destroy the substantial identity.”  Based on this rationale, the Court outlined the “ordinary observer” test that is still used by courts today in design patent infringement cases: