[[http://www.sunreign.com/info/ParabolicTrough Back to Parabolictrough.org Hompage.]]

[[http://www.google.com/patents?id=4bwwAAAAEBAJ Trough Design 4129119,1978]]
[[http://www.google.com/patents?id=Km40AAAAEBAJ Trough Design 4108154,1978]]
[[http://www.google.com/patents/about?id=kDo5AAAAEBAJ Trough Design 4135493,1979]]
[[http://www.google.com/patents?id=_DUuAAAAEBAJ Trough Design 4178913,1979]]
[[http://www.google.com/patents?id=-yc8AAAAEBAJ Trough Design 4240406,1980]]
[[http://www.google.com/patents?id=KOABAAAAEBAJ Trough Design 4297003,1981]]
[[http://www.google.com/patents?id=FtgBAAAAEBAJ Trough Design 4296737,1981]]
[[http://www.google.com/patents?id=iMczAAAAEBAJ Trough Design 4423719,1984]]
[[http://www.google.com/patents?id=3_MqAAAAEBAJ Trough Design 4493313,1985]]
[[http://www.google.com/patents?id=EvA3AAAAEBAJ Trough Design 4611575,1986]]
[[http://www.google.com/patents?id=yNwoAAAAEBAJ Trough Design 5058565,1991]]
[[http://www.google.com/patents?id=JH4KAAAAEBAJ Trough Design 6406155,2002]]
[[http://www.google.com/patents?id=spAYAAAAEBAJ Trough Design 5964216,1999 (Expires 2019)]]

[[http://www.google.com/patents?id=OagzAAAAEBAJ Fresnel Design 4131336,1978]]
[[http://www.google.com/patents?id=zJQ8AAAAEBAJ Fresnel Design 4149817,1979]]

[[http://www.google.com/patents?id=l8o2AAAAEBAJ Method of manufacturing 4236399,1980]]
[[http://www.google.com/patents?id=Qg0xAAAAEBAJ Method of manufacturing 4268332,1981]]
[[http://www.google.com/patents?id=SSsuAAAAEBAJ Method of manufacturing 4243019,1981]]
[[http://www.google.com/patents?id=hcIPAAAAEBAJ Method of manufacturing 4372027,1983]]
[[http://www.google.com/patents?id=FY0DAAAAEBAJ Method of manufacturing 6035850,2000]]
[[http://www.google.com/patents/about?id=PASUAAAAEBAJ Method of manufacturing 11/157,607,2005]]

[[http://www.google.com/patents/about?id=Ixw0AAAAEBAJ Solar Cooling 4246885,1981]]