Systems and methods for free demonstration of online premium content prior to purchase
US7725929B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2005 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Jan 9, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/603
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Key-limited use applications are maintained at a central service where the central service can receive requests from a remote computing device for access to the key-limited use applications. The key-limited use applications include publicly available portions and a locked portions accessible with a key. The central service can provide a key to the remote computing device associated with a key-limited use application for complete access. The key can be stored in a memory device associated with the remote computing device. A digital signature can be assigned to the key to prevent operation of the key in a second computing device. Unauthorized or unlicensed computing devices are prevented from using the applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.