# US 5,710,419 A · Record with removable two-dimensional code > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,710,419 A - Document ID: US5710419A - Status: Granted - Kind: A - Application number: 08/453,098 - Filed: 1995-05-30 - Granted: 1998-01-20 - Earliest claimed: 1990-01-05 - Assignees: Symbol Technologies, Inc. - Inventors: Ynjiun P. Wang; Jerome Swartz; Daniel R. McGlynn - Web page: https://patentgrep.com/patent/US5710419A ## CPC - G07G 1/0045: {with a code reader for reading of an identifying code of the article to be registered, e.g. barcode reader or radio-frequency identity [RFID] reader} - G03H 1/041: {Optical element in the object space affecting the object beam, not otherwise provided for} - G06F 3/002: {Specific input/output arrangements not covered by G06F3/01 - G06F3/16 (other optical apparatus G02B27/00)} - G06F 8/60: Software deployment - G06F 8/71: Version control (security arrangements therefor G06F21/57); Configuration management - G06K 1/121: {by printing code marks (applying code marks to labels B65C9/46; marking or coding completed packages B65B61/26)} - G06K 1/126: {by photographic or thermographic registration (recording apparatus for measuring instruments G01D15/00)} - G06K 7/14: using light without selection of wavelength, e.g. sensing reflected white light {(G06K7/10831 - G06K7/1097 take precedence)} - G06K 7/1417: {2D bar codes} - G06K 7/1443: {locating of the code in an image} - G06K 7/1456: {determining the orientation of the optical code with respect to the reader and correcting therefore} - G06K 7/1486: {Setting the threshold-width for bar codes to be decoded} - G06K 7/1491: {the method including a reconstruction step, e.g. stitching two pieces of bar code together to derive the full bar code} - G06K 19/06037: {multi-dimensional coding} - G06K 19/06046: {Constructional details} - G06K 19/18: Constructional details - G06K 2019/06253: {for a specific application} - G07G: REGISTERING THE RECEIPT OF CASH, VALUABLES, OR TOKENS - G03H: HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; {stereo-photographic or similar processes G03C9/00}; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; {stereoscopic or other three dimensional effects in television systems H04N13/00}) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS ## Abstract A printing and reading system prints records having two-dimensional erasable bar codes. The bar code is printed on the record in erasable ink and can be implemented in PDF417 format. The system reads the two-dimensional erasable bar code located on the record, erases it using erasing fluid, dries it, and prints a new two-dimensional erasable bar code in place of the previous two-dimensional erasable bar code. ## Claims ### Claim 1 A record printing system comprising: a detector for detecting the presence of removable information on a record, the record including a printed portion containing text, and an information portion including the removable information encoded in an error-correctable, machine-readable format, said removable information being printed in said information portion of said record in erasable ink to permit said removable information to be removed by erasing the erasable ink; an erasing unit for erasing the removable information from the information portion of the record when the detector detects the presence of the removable information, the erasing unit continues erasing until the detector detects that the removable information has been completely erased; and a printing unit for printing new removable information in the information portion of the record. ### Claim 2 (depends on 1) The record printing system of claim 1 wherein the removable information in the information portion is encoded in a two-dimensional bar code. ### Claim 3 (depends on 2) The record printing system of claim 2 wherein the removable information in the information portion is encoded in PDF417 format. ### Claim 4 (depends on 1) The record printing system of claim 1 wherein the record is a medical record. ### Claim 5 (depends on 1) The record printing system of claim 1 wherein the information in the information portion includes information about the printed portion. ### Claim 6 (depends on 1) The record printing system of claim 1 wherein the record is a charge card, and the removable information relates to remaining available credit. ### Claim 7 (depends on 1) The record printing system of claim 1 wherein the record is an admission ticket to multiple events and the removable information relates to identification of unused multiple events. ### Claim 8 (depends on 1) The record printing system of claim 1 wherein the record is a medical record for a designated individual and the removable information relates to health matters of the designated individual. ### Claim 9 A record printing system comprising: a detector for detecting the presence of a removable symbol on a record, the removable symbol being printed on the record in erasable ink to permit the removable symbol to be removed by erasing the erasable ink; an erasing unit for erasing the removable symbol from the record when the detector detects the presence of the removable symbol, the erasing unit continues erasing until the detector detects that the removable symbol has been erased; and a printing unit for printing a new removable symbol on the record. ### Claim 10 (depends on 9) The record printing system of claim 9 wherein the removable symbol on the record is encoded in a two-dimensional bar code. ### Claim 11 (depends on 9) The record printing system of claim 9 wherein the removable symbol on the record is encoded in PDF417 format. ### Claim 12 (depends on 9) The record printing system of claim 9 wherein the record is a medical record. ### Claim 13 (depends on 12) The record printing system of claim 12 wherein the removable symbol on the record includes information relating to vital statistics of an individual's health. ### Claim 14 (depends on 9) The record printing system of claim 9 wherein the record is a charge card, and the removable symbol relates to remaining available credit. ### Claim 15 (depends on 9) The record printing system of claim 9 wherein the record is an admission ticket to multiple events, and the removable symbol relates to identification of unused multiple events. ### Claim 16 (depends on 9) The record printing system of claim 9 wherein the record is a medical record for a designated individual and the removable symbol relates to health matters of the designated individual. ### Claim 17 A method for printing removable information on a record including a printed portion containing text, and an information portion including the removable information encoded in an error-correctable, machine-readable format, the removable information being printed in the information portion of the record in erasable ink to permit the removable information to be removed by erasing the erasable ink, the method comprising the steps, executed by a record printing system, of: receiving a record to be printed; detecting the presence of removable information in the information portion of the record; erasing the removable information from the information portion of the record when the detecting step detects the presence of the removable information, the erasing step continues erasing until the detecting step detects that the removable information has been completely erased; and printing new removable information in the information portion of the record .