Method and apparatus for remotely identifying an electronically coded article
US5883592A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Dec 10, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Apparatus, and a concomitant method of operation for the apparatus, for responding to an interrogation signal transmitted by a remotely located interrogator comprising: a demodulator for demodulating the interrogation signal; a signal processor, coupled to the demodulator, for interpreting a set up instruction contained in the interrogation signal and for initiating a counter to count cycles of a carrier wave signal contained in the interrogation signal; and a modulator, coupled to the signal processor, for transmitting a pulse when the signal processor indicates that the counter has attained a count value that matches a codeword stored in the signal processor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.