The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 2002
Filed:
Mar. 04, 1999
Sony Corporation, Tokyo, JP;
Abstract
A rotary drum device and a helical scan magnetic recording/reproducing apparatus employing an MR head as a playback magnetic head. The rotary drum device and the helical scan magnetic recording/reproducing apparatus each include a cylindrically-shaped rotary drum, an inductive magnetic head loaded on the rotary drum so that its portion is protruded from the outer periphery of the rotary drum and a magneto-resistive effect magnetic head loaded on the rotary drum so that its portion is protruded from the outer periphery of the rotary drum. An amount of protrusion from the outer periphery of the rotary drum of the magneto-resistive effect magnetic head is smaller than an amount of protrusion from the outer periphery of the rotary drum of the inductive magnetic head.