(KRON) – A district court in California has ruled that the Oakland International Airport must stop using its new name, the "San Francisco Bay Oakland International Airport." The Port of Oakland opted to change the name in April to include the words "San Francisco Bay" to increase the visibility of the airport, claiming that travelers did not know Oakland was located in the Bay Area. But the City of San Francisco took issue with the new name, and sued the Port of Oakland and City of Oakland. The court ruled in favor of San Francisco this week, approving a preliminary injunction on Tuesday. "The Court has determined that San Francisco is likely to prevail on its claim that the new name of the Oakland airport uses San Francisco’s [trademark] in a way that falsely implies affiliation, connection and association. “ Airport-Court-Documents-1Download Officials with the San Francisco International Airport (SFO) had submitted evidence that 15 travelers went to SFO when they meant to go to the Oakland International Airport (OAK), according to court documents. Some Instagram users tagged the Oakland airport in pictures of SFO as well. The City of San Francisco alleged three kinds of "confusion" based on the new airport name. The court agreed that the Oakland airport's new name made travelers think the two airports were associated with one another, but did not agree on the two other "confusions" alleged to occur during a traveler's "initial interest" or at the "point of sale." US prohibits airlines from flying to Haiti and UN suspends flights after planes were shot The Port of Oakland, in response, disputed the court's findings in an official statement. "The court order temporarily blocks OAK’s new name on the basis of the third type of alleged confusion: that travelers may think OAK is affiliated with SFO," reads the Port of Oakland's statement, in part. "OAK is not associated with SFO, of course, but is rather a convenient and centrally located option for travelers throughout the Bay Area." "We are continuing to review the recent ruling and considering all available options." San Francisco had filed its lawsuit against Oakland and the port Commissioners in April, right after the Port of Oakland decided to move forward with the name change. San Francisco City Attorney David Chiu, speaking after Tuesday's ruling, said San Francisco officials had "tried reasoning with Oakland officials" for months to avoid litigation. “Unfortunately, those efforts were not productive, and we had no choice but to ask the court to step in and protect our trademark," Chiu said. "San Francisco has invested millions in making San Francisco International Airport® the world class airport it is today. We have built an incredible brand, and we are happy the Court agreed that brand should be legally protected from trademark infringement.” The court's ruling on Tuesday mandates that the Oakland airport stop using the name everywhere, including advertisements, marketing, and promotion.