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| Number | Title | Issue Date |
| 7153366 | Systems and method for forming a servo pattern on a magnetic tape The systems, methods and products of the invention include systems and methods for manufacturing servo tracks on a magnetic tape. In one aspect, the invention includes systems for manufacturing magnetic tapes having servo tracks thereon wherein the servo tracks are ... | 12/26/2006 |
| 7142336 | Recording medium and hologram reader A recording medium including a storage part to hold a medium identifier intrinsic to each recording medium, and a hologram generated using a reference beam modulated with the medium identifier. Preferably, the hologram is fixed on a surface of the recording medium. | 11/28/2006 |
| 6956681 | Integrated reading and writing of a hologram with a rotated reference beam polarization A method for monitoring diffraction while recording a hologram includes: generating a source beam; generating a data beam by projecting a first component of the source beam through a data source, the data beam having a first polarization; generating a reference beam... | 10/18/2005 |
| 5684612 | Method and system for maintaining and controlling the signal-to-noise ratio of hologams recorded in ferroelectric photorefractive materials A hologram with a dynamically controlled diffraction efficiency and enhanced signal-to-noise ratio is recorded in ferroelectric photorefractive materials, such as strontium barium niobate (Srx Ba1-x Nb2 O6) (SBN... | 11/04/1997 |
| 4810868 | Frasable optical wallet-size data card A data card having an optical recording medium formed by an erasable layer atop a polymer layer with prerecorded indicia, all atop a card base. The polymer layer has surface contours which constitute prerecorded indicia. The erasable layer disposed over t... | 03/07/1989 |
| 3961837 | Magnetically actuated deflectable membrane page composer for holography The device comprises a flexible magnetic sheet reflective on one side, at least one magnetic circuit associated with at least one zone of the sheet for deforming the sheet by a modification of the magnetic flux in the magnetic circuit. Exciting means cont... | 06/08/1976 |
