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. 30, 1982
Filed:
Jan. 12, 1981
Kurt Ehrat, Steinmaur, CH;
Zeag Systems AG, Schlieren, CH;
Abstract
An imitation-proof card-like data carrier which permits light to pass through a large number of light-conducting elements each having a light-admitting inlet portion, a light-discharging outlet portion which is laterally offset relative to the inlet portion, and a light-conducting intermediate portion with two reflecting surfaces, one adjacent to the inlet portion and the other adjacent to the outlet portion. The information which is stored in or denoted by an element is characterized by the distance beween the inlet and outlet portions as well as on the inclination of that reflecting surface which directs light into the outlet portion. The light rays issuing from the outlet portions of the elements impinge upon selected photodiodes of an array of photodiodes in an apparatus into which the data carrier is inserted to ascertain the genuineness thereof, to ascertain the identity of the bearer, to cancel certain elements if each element represents a sum of money and/or for other purposes.