The preliminary injunction, issued on July 8, barred HP from infringing on trademarks registered to storage maker EMC.
The case arose after HP stopped selling a high-end EMC data storage product and instead began selling a new product from Hitachi Data Systems that had a similar name to the one from EMC.
EMC filed the lawsuit on May 25 in response to new HP storage products introduced 20 days earlier.
HP released the SureStore E Disk Array MC256 to compete against similar products from EMC but referred to it in shorthand as the "E MC256," the suit contended.
Within a week of the preliminary injunction, HP changed the name of the product to the XP256.