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Here is what I see as an invalid patent. US6563040
I demonstrated a solar tracking mount I built at a Renewable Energy Fair, MREA Midwest Renewable Energy Association. in Custer. Wisconsin. Several thousand people saw it on or about June 21st 2001. A ...
Sep 22 '12 at 3:44
Duane C. Johnson
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Structure for supporting a photovoltaic module in a solar energy collection system
May 13, 2003
Oct 11, 2001
Oct 11, 2001
Herbert T. Hayden,
Jefferson G. Shingleton
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