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:
Oct. 09, 1979
Filed:
Mar. 20, 1978
Applicant:
Inventor:
Norihiko Sugimoto, Hitachi, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 40 ; 360 41 ; 360 51 ;
Abstract
The disclosure is concerned with a method of and apparatus for magnetic information recorded on a magnetic recording medium such as a thin magnetic card by the NRZ-I method. The omission of a timing pulse signal is sensed through a detection of two successive timing pulse signals of the same direction of magnetic inversion. As the omission of the timing pulse signal is detected, the missing timing pulse signal is corrected and the data corresponding to the corrected timing pulse signal is temporarily memorized. The memorized data is corrected when an omission of the data signal is detected later.