发明名称 Method of distribution of digital media having durational limits for digital media usage
摘要 A digital media distribution system includes a distribution center and an utilization device that communicates with, and receives digital media from, the distribution center. Restrictions are transferred with the digital media that limit the use of the digital media on the utilization device independently of the distribution center.
申请公布号 US2003066076(A1) 申请公布日期 2003.04.03
申请号 US20010967643 申请日期 2001.09.28
申请人 MINAHAN MICHAEL R. 发明人 MINAHAN MICHAEL R.
分类号 G06F1/00;G06F21/00;H04L29/06;(IPC1-7):H04N7/16;H04L9/00;H04N7/167 主分类号 G06F1/00
代理机构 代理人
主权项
地址