Flux-concentrating, non-ghosting electromagnetic read/write head
Patent 4984118 Issued on January 8, 1991. Estimated Expiration Date: 
January 9, 2009. 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.
January 9, 2009. 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 ReferencesMulti-head transducer assembly for helical scan video tape recorders Magnetic head having an integrated recording and playback head and an erasure head Magnetic head Patent #: 4866555 InventorAssigneeApplicationNo. 294351 filed on 01/09/1989US Classes:360/125, Head core360/119, Gap structure details360/122Head surface structureExaminersPrimary: Tupper, Robert S.Attorney, Agent or FirmInternational ClassesG11B 005/187G11B 005/23 G11B 005/127 AbstractAn electromagnetic read/write head structure for longitudinal/horizontal reading and writing including first and second magnetic pole components which are spaced by a substantially uniform-width, linear, planar gap. Each pole component is characterized by a configuration, measured generally in the plane of the gap, where no portions of the outlines of the pole components, save those portions which actually define the gap, include any stretch extending parallel to the gap. | |
