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New Patent Issues to MSV on Satellite-Terrestrial Communications Systems

Wednesday, May 23, 2007

Novel Interference-Reduction Techniques Claimed

Reston, VA.-- Mobile Satellite Ventures LP announced today that it has been awarded a patent by the U.S. Patent and Trademark Office for antenna-configuration techniques that reduce interference between terrestrial and satellite links. The patent is the 21st to issue to MSV since 2004, protecting the company’s hybrid satellite-terrestrial system including Ancillary Terrestrial Component technology.

"The patent addresses methods whereby terrestrial base stations may use satellite frequencies in a staggered sectorization pattern to reduce the amount of energy being radiated in a given direction," said Dr. Peter D. Karabinis, MSV Senior Vice President and inventor of the patent. "Accordingly, interference is reduced and spectrum is used more efficiently."

U.S. Patent No. 7,218,931 is titled "Staggered Sectorization for Terrestrial Reuse of Satellite Frequencies" and was issued May 15. Overall, MSV owns more than 70 issued U.S. patents and has more than 100 pending applications in the U.S. and abroad, Dr. Karabinis said.

"MSV takes seriously its role as the undisputed pioneer of ATC technology," said Alexander H. Good, MSV Vice Chairman, Chief Executive Officer and President. "Our patent portfolio is best-in-class and clearly illustrates our leadership in satellite-terrestrial communications."

About Mobile Satellite Ventures LP and SkyTerra Communications, Inc.

Today, MSV satellites MSAT-1 and MSAT-2 deliver mobile wireless voice and data services to approximately 200,000 units primarily for public safety, security, fleet management and asset tracking in the U.S. and Canada. MSV is developing a hybrid satellite-terrestrial communications network, which it expects will provide seamless, transparent and ubiquitous wireless coverage of the United States and Canada to conventional handsets. MSV holds the first FCC license to provide hybrid satellite-terrestrial services. MSV plans to launch two satellites for coverage of the United States and Canada, which are expected to be among the largest and most powerful commercial satellites ever built. When completed, the network is expected to support communications in a variety of areas including public safety, homeland security, aviation, transportation and entertainment, by providing a platform for interoperable, user-friendly and feature-rich voice and high-speed data services. MSV is majority owned and controlled by SkyTerra Communications, Inc. (OTCBB:SKYT).

Statement under the Private Securities Litigation Reform Act

This news release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act, with respect to plans described in this news release. Such statements generally include words such as could, can, anticipate, believe, expect, seek, pursue, proposed, potential and similar words. Such forward-looking statements are subject to uncertainties relating to the ability of SkyTerra and MSV to raise additional capital or consummate a strategic transaction or deploy the next generation system, as well as the ability of SkyTerra and MSV to execute their business plan. We assume no obligation to update or supplement such forward-looking statements.

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