Bar code scanner and method of programming
US4861972A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1987 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Nov 5, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2207/1017
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The scanner includes scanning circuitry for optically scanning bar code labels and providing an electrical signal in response thereto, decoding circuitry, responsive to the scanning circuitry for translating the electrical signal into a digital signal, and a microprocessor, responsive to the decoding circuitry, for controlling operation of the scanner and for translating the digital signal into data to be provided to the associated host computer under control of control characters. A non-volatile random access control memory is provided for storing control characters. Interface circuitry, connected to the host computer and to the microprocessor, transfers data from the microprocessor to the host computer. A switch enables the microprocessor to translate the digital signal into control characters and enables the microprocessor to store the control characters in the non-volatile random access control memory. The control characters may be character sets which when read by the scanner indicate that two bar code labels are associated with the same item.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.