(11) Commitments and Contingencies

Leases

Skyhook leases various properties under operating leases expiring at various times through 2021. The aggregate minimum annual lease payments under the noncancelable operating leases as of December 31, 2017 are as follows (amounts in thousands):

Skyhook’s two principal facilities are under lease through December 2019 and January 2021, respectively. Total rental expense for the years ended December 31, 2017,  2016 and 2015 was $1.1 million, $2.4 million and $3.7 million, respectively.

Litigation

On May 23, 2012, Skyhook (then known as TruePosition) filed a patent infringement lawsuit in the U.S. District Court for the District of Delaware against Polaris Wireless, Inc. (“Polaris”), related to the sale by Polaris of systems used to locate mobile devices.  In parallel with the lawsuit, at Polaris’s request, the U.S. Patent and Trademark Office initiated an Inter Partes Review.  Both the District Court and the Patent Trial and Appeal Board ruled adversely to Skyhook and those rulings were upheld on appeal. No further appeal was taken. During the pendency of the appeal, Polaris filed a motion in the District Court for an award of approximately $3 million in attorneys’ fees and expenses incurred in defending the lawsuit.  The matter was heard by the Court on October 16, 2015, wherein the court denied the Polaris motion.

On September 10, 2010, Skyhook filed a patent infringement lawsuit in the U.S. District Court for the District of Massachusetts against Google, Inc. (“Google”). In March 2013, Skyhook amended its lawsuit to add additional claims. In total, at the time the case was to be tried, Skyhook alleged that Google infringed on eight Skyhook patents involving location technology and sought an injunction and/or award of damages in an amount to be determined at trial. The case had been scheduled to be tried before a jury commencing March 9, 2015.  However, on March 5, 2015, the parties advised the District Court that the case has been settled and thereby dismissed the action without costs and without prejudice to the right person, upon good cause shown within 45 days, to reopen the action if settlement is not consummated. On March 27, 2015, the parties consummated a final settlement agreement and on April 24, 2015, Google paid Skyhook settlement consideration of $90 million. In return for payment of the settlement consideration, Google received dismissal of the action with prejudice, a license to the existing Skyhook patents and patent applications (and their continuations, divisionals, continuations-in-part), a three-year covenant not to sue (subject to limited exceptions) and a mutual release of claims. The settlement amount of $90 million is recorded net of approximately $29.5 million for legal fees in the statement of operations for the year ended December 31, 2015.

General Litigation

In the ordinary course of business, the Company and its consolidated subsidiaries are parties to legal proceedings and claims involving alleged infringement of third-party intellectual property rights, defamation, and other claims. Although it is reasonably possible that the Company may incur losses upon conclusion of such matters, an estimate of any loss or range of loss cannot be made. In the opinion of management, it is expected that amounts, if any, which may be required to satisfy such contingencies will not be material in relation to the accompanying consolidated financial statements.

Off-Balance Sheet Arrangements

Liberty Broadband did not have any off-balance sheet arrangements that have, or are reasonably likely to have, a current or future effect on the Company’s financial condition, results of operations, liquidity, capital expenditures or capital resources.