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US Patent 7448170 Indirectly prestressed, concrete, roof-ceiling construction with flat soffit

Overview Structured Data Issues Contributors

Is a

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Date Filed

November 19, 2002

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Date of Patent

November 11, 2008

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Patent Application Number

10489952

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Patent Citations Received

US Patent 12135445 Method of fabricating a light-guide optical element

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US Patent 11914187 Image waveguide with symmetric beam multiplication

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US Patent 12124037 Compound light-guide optical elements

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US Patent 12124050 Compact collimated image projector

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US Patent 11789264 Display with stacked light-guide elements providing different parts of field of view

US Patent 11860369 Optical system with compact coupling from a projector into a waveguide

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US Patent 11886008 Methods of fabrication of compound light-guide optical elements having embedded coupling-in reflectors

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US Patent 11885966 Optical systems including light-guide optical elements with two-dimensional expansion

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US Patent 11914161 Apparatus and methods for eye tracking based on eye imaging via light-guide optical element

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

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Patent Primary Examiner

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