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(u.s. patent and patent pending.) versacorp (tm, sm) innovative optical instruments for astronomy, photography, surveillance: diaguider (tm) and versagonal (tm) patented multiple flip mirror systems (u.s. patents d , , d , , d , ) versascope (tm) optics for photo-visual use of ed telephoto camera lenses
(u.s. patent and patent pending.) versacorp (tm, sm) innovative optical instruments for astronomy, photography, surveillance: diaguider (tm) and versagonal (tm) patented multiple flip mirror systems (u.s. patents d , , d , , d , ) versascope (tm) optics for photo-visual use of ed telephoto camera lenses...
http://www.versacorp.com/vlink/legal/patent.htm