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RIM Patent Suit Partly 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 said  part of the earlier court ruling was flawed and sent the case  back to a lower court. 