A federal judge says J.M. Smucker can proceed with its lawsuit against Trader Joe’s over frozen sandwiches that Smucker argues are too similar to its Uncrustables. Smucker sued Trader Joe’s in federal court in Ohio last fall. The suit alleges that Trader Joe’s violated Smucker's trademark when it introduced frozen peanut butter and jelly sandwiches with the same round shape and crimped edges as Uncrustables. In court filings, Trader Joe’s said the crimped design is functional and Smucker shouldn’t be allowed to monopolize it. A federal court judge ruled on Friday that Smucker has sufficiently invested in its product over the past 20 years and customers identify rounded frozen sandwiches with Uncrustables.