Digital watermarks and trading cards
US6735324B1 · kind B1 · utility
113Cited by
24References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2000 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Jul 31, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3271
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Digital watermarks can be employed in conjunction with trading cards (e.g., baseball cards, fantasy game cards, etc.) to serve a variety of purposes. Among these are facilitating on-line collecting and game-play. Digital watermarks may also be used in distinguishing genuine cards from counterfeits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.