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:
Nov. 28, 1989
Filed:
Apr. 26, 1988
Applicant:
Inventors:
Hiroshi Kokubo, Kyoto, JP;
Kinji Tsuboi, Yokohama, JP;
Assignees:
Tokyu Car Corporation, Yokohama, JP;
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
235449 ; 235487 ; 235494 ;
Abstract
When an induction coil which is supplied with an alternating current to output an induction current is moved along patterns formed on a data recording sheet, the magnitude of induction current generated in the induction coil changes in accordance with changes in the patterns. The change in the magnitude of the induction current is detected by a read device to thereby read information contained in the data recording sheet.