Magnetic bubble element
Patent 4122539 Issued on October 24, 1978. Estimated Expiration Date: 
April 12, 1997. 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.
April 12, 1997. 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 References3540021 InventorAssigneeApplicationNo. 05/786929 filed on 04/12/1977US Classes:365/42, Wedges365/19Conductor propagationExaminersPrimary: Canney, Vincent P.Attorney, Agent or FirmInternational ClassesG11C 19/08 (20060101)G11C 19/00 (20060101) AbstractA magnetic bubble element which is useful as an image information processing element. A thin film made of a magnetic bubble forming material has a plurality of wedge-formed patterns made of a non-magnetostriction soft magnetic thin film is formed on the upper surface of the thin film 16. A conductor grating comprising two undulating conductor patterns are provided each cycle of the undulation in both conductor patterns defining a wider pitch and a narrower pitch, each of the wedge-formed patterns being disposed over the corresponding part of one of the two conductor patterns defining the narrower pitch in a manner such that the apex portion and the bottom portion of each wedge shaped pattern extend into the parts forming the wider pitch.Other References
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