By Joseph Checkler 

A federal judge has dismissed much of the lawsuit LightSquared and Harbinger Capital Partners filed against companies in the global-positioning-system industry but said LightSquared can proceed with claims that the GPS equipment interferes with LightSquared's network.

Judge Richard M. Berman of U.S. District Court in Manhattan tossed most of the claims against the GPS companies, Garmin Ltd. and Trimble Navigation Ltd., as well as ones against Deere & Co., including one for unjust enrichment and another for breach of contract. All of Harbinger's claims are gone, while nine of 11 LightSquared ones were thrown out.

In 2013, Philip Falcone's Harbinger, which owns LightSquared, sued the GPS companies and industry groups in federal court. Harbinger claimed it never would have made such a large investment in LightSquared--it said it lost $1.9 billion--had the GPS industry raised its concerns over LightSquared's network interfering with GPS earlier. Those concerns wound up driving LightSquared into bankruptcy in May 2012 after regulators refused to allow it to use its network. LightSquared later joined in on that suit, making similar claims.

Last May, the GPS companies sought dismissal of the suits, calling them "wildly implausible claims."

In a statement Thursday, LightSquared said it was happy the court would allow it to move forward with its claim that the GPS companies' receivers are "designed to intrude" with LightSquared's network.

"LightSquared has always maintained that any interference issues are caused by the design of GPS receivers and not the design of LightSquared's proposed network," the company said.

The company will be able to probe the firms' books in discovery. Lawyers for the GPS companies didn't immediately respond to a request for comment.

LightSquared filed for Chapter 11 shortly after federal regulators refused to clear LightSquared's plans to launch its wireless network. Those regulators heeded warnings from the GPS industry that the network could interfere with GPS.

LightSquared isn't able to fully use spectrum that it owns without support from the Federal Communications Commission, and the FCC so far has refused to grant such approval.

Write to Joseph Checkler at joseph.checkler@wsj.com

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