Signature identification system

• US 5,150,420 A
• Filed: 06/18/1991
• Issued: 09/22/1992
• Est. Priority Date: 10/21/1985
• Status: Expired due to Term

• Current Assignee: Omron Tateisi Electronics Co. (Omron Corporation)
• Original Assignee: Omron Tateisi Electronics Co. (Omron Corporation)
• Inventors: Haraguchi, Kaoru
• Primary Examiner(s): Mancuso, Joseph
• Application Number:
  US07/715,742
• Time in Patent Office: 462 Days
• Field of Search: 382/3, 382/13, 235/380, 178/18-20, 340/825.34
• US Class Current: 382/119
• CPC Class Codes: B42D 25/00 Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof printing processes to produce identification or security features B41M3/14
• CPC Class Codes: B42D 25/318 Signatures
• CPC Class Codes: G06Q 20/341 Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
• CPC Class Codes: G06Q 20/40145 Biometric identity checks
• CPC Class Codes: G07C 9/247 electronically, e.g. by comparing signal of hand-writing with a reference signal from the pass
• CPC Class Codes: G07F 7/1008 Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system

Abstract

A signature identification system includes an IC card having a memory storing sign data representing a genuine signature and a display device for displaying the genuine signature by readign the sign data stored in the IC card. A writing unit includes a sign reading device for reading a genuine signature signed by an authorized person and a writing device for writing data representing the read genuine signature on an IC card, whereby the genuine signature is invisibly stored in the IC card and imitation of the genuine signature by viewing the genuine signature in the card can be avoided.

Claims

1. A signature identification system for use with a user memory card adapted to electronically store invisible hand-written signature data representing a genuine signature of said user in a data storage area therein, said system comprising:

a handwriting input device comprising;

signature input means for inputting a hand-written signature;

signature reading means for reading said hand-written signature inputted by a genuine user of said memory card; and

writing means for writing said hand-written signature as hand-written signature data in said data storage area on said memory card, including;

a controller to control operations of said writing means, said controller receiving said read hand-written signature from said signature reading means and converting it to hand-written signature data;

a memory connected to said controller for storing said hand-written signature data;

a display memory connected to said memory and controller for receiving said hand-written signature data;

a display means for displaying said hand-written signature data; and

,

a display controller for converting said hand-written signature data stored in said display memory into a format for display on said display means;

means for reading out said hand-written signature data in said data storage area of said memory card;

said controller receiving said read out hand-written signature data for displaying it on said display means as a genuine hand-written signature; and

said display means, responsive to said controller, for displaying said genuine hand-written signature so that said genuine hand-written signature displayed on said display means can be visually compared with another hand-written signature signed on another document to identify if said other hand-written signature is genuine.

2. The signature identification system of claim 1 further comprising means connected to said controller and to said display controller for switching said display memory to said controller and providing access by said controller to said display controller.

3. The signature identification system of claim 2, wherein data stored in said memory comprises, in coordinate form, a plurality of dots on an ordinate axis and a plurality of dots in an abscissa axis in order that said hand-written signature data forms an image to be displayed based upon said coordinate image.