Holograms
Patent 4623215 Issued on November 18, 1986. Estimated Expiration Date: 
July 25, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 25, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3567305 3603668 3623798 3922416 Light filtering arrangement for holographic displays Production of volume dielectric holograms Multicolor hologram and method for forming same Patent #: 4244633 InventorAssigneeApplicationNo. 06/758590 filed on 07/25/1985US Classes:359/32For reconstructing imageExaminersPrimary: Arnold, Bruce Y.Attorney, Agent or FirmInternational ClassesG03H 1/00 (20060101)G03H 1/24 (20060101) Foreign Application Priority Data1982-02-15 GBAbstractA hologram viewing apparatus, an integral direct viewing hologram device and an article useful in the manufacture of hologram devices are predicated upon a particular set of components grouped according to a number of permutations. The viewing apparatus comprises a screen consisting of at least a plane grating, the hologram device comprises a venetian blind film having a hologram embossed on or bonded onto one surface and a plane grating embossed on or bonded onto the other surface, and the article useful in the manufacture of hologram devices comprises a venetian blind film embossed on one side with a plane grating.Other References
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