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    2. Cree's Doherty amplifier-based patents may be licensed for the manufacture and sale of Doherty-based amplifier products. The US patents included in this license are listed in the table below; foreign counterparts are also included. Contact Cree at licensing@cree.com for further information.

      Patent No. or Publication No.Issue DateFull Title
      US # 6,737,922 May 18, 2004 N-way RF power amplifier circuit with increased back-off capability and power added efficiency using unequal input power division
      US # 6,791,417 September 14, 2004 N-way RF power amplifier circuit with increased back-off capability and power added efficiency using selected phase lengths and output impedances
      US # 6,700,444 March 2, 2004 N-way RF power amplifier with increased backoff power and power added efficiency
      US # 7,764,120 July 27, 2010 Integrated circuit with parallel sets of transistor amplifiers having different turn on power levels
      US # 7,193,473 March 20, 2007 High power Doherty amplifier using multi-stage modules
      US # 6,798,295 September 28, 2004 Single package multi-chip RF power amplifier
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