Portable terminal apparatus and communication method thereof
US6606662B2 · kind B2 · utility
84Cited by
9References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1998 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Jun 9, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1441
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The authorization of a user is performed in such a way that the user inputs one or more characters to a portable terminal apparatus using a pen input apparatus, and the handwriting of the input character(s) is compared with the handwriting of the authorized user, which is stored (e.g., in a flash ROM) in advance. When it is determined that the portable terminal apparatus is being used by an unauthorized user, a communication device is activated, and the server is notified of the fact that the portable terminal apparatus is being used by the unauthorized user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.