A judge ended a hearing over a request for an injunction against the maker of the handheld BlackBerry device without issuing a decision Friday.

During the hearing, NTP Inc., a small patent holding firm that successfully sued Research In Motion, asked U.S. District Judge James R. Spencer to impose an injunction on the service but permit a 30-day grace period so all sides could work out the details of how to exempt government and emergency workers, among other issues.