Recording device
US7383446B1 · kind B1 · utility
20Cited by
6References
18Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 29, 2000 |
| Grant date | Jun 3, 2008 |
| Priority date | — |
| Expiry date | Aug 11, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H20/12
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A memory card includes a user ID hold unit holding user ID data provided to identify the user of the memory card, a first protection information memory unit holding first protection information restricting access to memory card, and a second protection information memory unit holding second protection information restricting access for each content data. Memory card refers to the user ID data to identify the user of the reproduction apparatus of interest and prohibits any unauthorized user from changing first and second protection information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.