07/18/2009 05:12 am ET | Updated May 25, 2011

Solar Power Satellites: Can We Get Energy From Space?

PowerSat Corp., based in Everett, Wash., said Tuesday it had filed for a patent meant to solve two of the trickier problems bedeviling those engineers who want to tap into the solar system's abundant supply of free energy. That includes figuring out a way to tie lots of smaller solar satellites together to act like one big one, and figuring out a cheaper way to get them into space in the first place.

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