Code symbol reading apparatus, code symbol reading method and medium
US9158955B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Jul 12, 2013 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Sep 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10851
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A code symbol reading apparatus, that reads a code symbol on an object to be read by scanning the object, repeats trial to read the code symbol until the apparatus succeeds in reading, while changing a transmission frequency of a filter that processes a signal representing a light intensity variation obtained through the scan and in which transmittance depends on a frequency of the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.