Method and apparatus responsive to a code signal conveyed through a graphic image
US5710834A · kind A · utility
356Cited by
128References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1995 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | May 8, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/018
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An identification code signal is impressed on a carrier to be identified (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be discerned and the carrier thereby identified. The method and apparatus are characterized by robustness despite degradation of the encoded carrier, and by permeation of the identification signal throughout the carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.