Among other data, Yahoo is asking the court to order Expedia to turn over all contracts with American Airlines as well as market research about the conversion rates of users who came to Expedia through sponsored search ads.

The airline sued Yahoo last year in federal district court in Texas for trademark infringement on the theory that Yahoo allowed other companies to use "American Airlines" to trigger paid search ads. Among the companies that allegedly used the name as a trigger was the online travel agency Expedia.

While American Airlines allows Expedia to sell tickets, the airline objects to Expedia purchasing "American Airlines" as a keyword, according to Yahoo. The airlines alleges both that Expedia is infringing the American Airlines trademark and that Yahoo has interfered with the airline's contract with Expedia by allowing such ads, according to Yahoo's court papers.

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