Holograms
Patent 4623214 Issued on November 18, 1986. Estimated Expiration Date: 
December 5, 2004. 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.
December 5, 2004. 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. 06/678755 filed on 12/05/1984US Classes:359/24, Superimposed holograms only359/569Including particular grating characteristicExaminersPrimary: Arnold, Bruce Y.Attorney, Agent or FirmInternational ClassesG03H 1/00 (20060101)G03H 1/24 (20060101) Foreign Application Priority Data1982-02-15 GBAbstractAn 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 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 with a plane grating embossed or bonded on one side.Other References
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