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BlackBerry Maker's Patent Suit Upheld  TORONTO/WASHINGTON (Reuters) - A U.S. appeals court upheld  a patent infringement finding against BlackBerry e-mail device  maker Research In Motion Ltd. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=RIM.TO target=/stocks/quickinfo/fullquote"&gt;RIM.TO&lt;/A&gt; on Tuesday, but struck  down part of the ruling and sent it back to a lower court for  further proceedings. 