Self-scanning code reading device
US5216231A · kind A · utility
65Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 8, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Aug 8, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/453
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A code reading device, which converts a bar code displayed on a medium into electric signals by means of a photo-electric converter and outputs them after having decoded them into data, which can be dealt with by an information processing device, wherein there are disposed two memories for storing data decoded, respectively, at the present time and data decoded at the last time and a comparator for comparing the data stored in these memories, and decoded data are transmitted to the information processing device, only when the two data differ from each other so that the amount of outputted data is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.