![]() ![]() ![]() Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US00241021A Inventor E Pryor Original Assignee E Pryor Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents Lightweight hyperbolic paraboloid roof structureÄownload PDF Info Publication number US3757478A US3757478A US00241021A US3757478DA US3757478A US 3757478 A US3757478 A US 3757478A US 00241021 A US00241021 A US 00241021A US 3757478D A US3757478D A US 3757478DA US 3757478 A US3757478 A US 3757478A Authority US United States Prior art keywords roof structure members hyperbolic boundary roof Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US3757478A - Lightweight hyperbolic paraboloid roof structure ![]() US3757478A - Lightweight hyperbolic paraboloid roof structure ![]()
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