File:Sun catcher tracking system.gif: Difference between revisions

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(Drawing from Leifur Thor's patent with the USPTO #5,980,052)
 
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Latest revision as of 17:17, 12 August 2011

Drawing from Leifur Thor's patent with the USPTO #5,980,052

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current17:17, 12 August 2011Thumbnail for version as of 17:17, 12 August 2011545 × 800 (21 KB)Leifthor (talk | contribs)Drawing from Leifur Thor's patent with the USPTO #5,980,052

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