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:
May. 06, 1980
Filed:
Aug. 14, 1978
Abstract
A magnetic transfer record film employed for magneto-optically reading magnetic record patterns. The magnetic transfer record film is formed, as the principal component, of an alloy of a heavy rare earth metal and a transition metal and has an easy axis of magnetization in a direction perpendicular to the film surface and further has an alloy composition included in a range of .+-.10% at the periphery of a center alloy composition where the saturation magnetic moment becomes minimum with respect to a change of the composition within a temperature range used. The magnetic transfer record film is deposited on a transparent substrate and positioned closely to a magnetic record medium on which a magnetic record pattern to be observed is stored, so that the magnetic record pattern is transferred to the magnetic transfer record film. An optical system is provided to magneto-optically read out the transferred magnetic record pattern from the magnetic transfer record film.