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. 08, 1994
Filed:
Oct. 22, 1993
Parameswaran B Nair, Acworth, GA (US);
Kumar S Choudhuri, Kennesaw, GA (US);
James T Stills, Atlanta, GA (US);
John C Evans, Atlanta, GA (US);
MicroBilt Corporation, Atlanta, GA (US);
Abstract
A low cost, easily-manufacturable circuit for a data card transaction terminal for reading a magnetic stripe on a data card. The circuit comprises a single, double-sided circuit board having minimized circuit components. The printed circuit board mounts an alphanumeric liquid crystal display (LCD) to a first side of the circuit board, a single chip LCD driver circuit, a bracket for extending through mounting holes in the circuit board and holding the liquid crystal display, keypad electrical contacts formed on the first side of the circuit board, and a plurality of circuit components all affixed to the second side of the circuit board. The circuit components affixed to the second side of the circuit board include a nonvolatile electrically erasable programmable read-only memory (EEPROM), a single chip modem circuit, data access arrangement circuitry for connecting the modem to an external telephone line, a magnetic stripe read head interface circuit, and a single chip microcomputer circuit including with internal mask-programmed read-only memory for storage of a software program. The circuit components include no memory components other than the EEPROM and memory internal to the single chip microcomputer.