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:
Apr. 11, 1978
Filed:
Mar. 29, 1976
Applicant:
Inventors:
Joachim Hack, Ludwigshafen, DT;
Udo Himmelmann, Ludwigshafen, DT;
Peter Rudolf, Ludwigshafen, DT;
Klaus Schulze-Berge, Ludwigshafen, DT;
Karl-Heinz Meyer, Dackenheim, DT;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, Rhineland, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360135 ; 360 77 ;
Abstract
The invention relates to a magnetic disc for track adjustment and amplitude control having at least one control track with magnetic control signals, this track being arranged in the central region of the recording area, and the control signals consisting of two different signals. The invention also relates to the geometric arrangement of the control signals in the track, their number, their amplitude, their frequency and their duration.