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. 14, 1977
Filed:
Apr. 07, 1976
Applicant:
Inventor:
Robert H Trenkamp, Cleveland Heights, OH (US);
Assignee:
Addressograph Multigraph Corporation, Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ; G06K / ; G06K / ; G11R / ;
U.S. Cl.
CPC ...
235 / ; 235 / ; 2401 / ; 360110 ;
Abstract
An optical and magnetic data transducer is provided comprising a magnetic reluctance aperture which is split into two sections with an optical reading aperture disposed generally therebetween. This reduces timing errors between the optical and magnetic output signals indicative of the spacial relation of the optical and magnetic data element boundaries, such errors being due to variations in temperature and skewing.