Fed. Circ. Nixes Microsoft Spell Check Patent Suit

Law360, New York (February 24, 2011, 5:40 PM EST) -- The Federal Circuit on Thursday upheld a lower court's decision to toss a 13-year-old suit brought by an inventor who claimed the spelling and grammar checker in Microsoft Corp.’s Word software infringed his source code.

The per curiam decision from the three-judge appeals panel affirmed without comment the U.S. District Court for the Northern District of California’s summary judgment that Martin G. Reiffin’s allegedly infringed patents did not actually predate Microsoft’s own patents.

The patents-in-suit describe a “preemptive multithreading computer system with clock activated interrupt,” essentially...
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