Number | Date | Country | Kind |
---|---|---|---|
4-010615 | Jan 1992 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4405942 | Block et al. | Sep 1983 | |
4819098 | Ryan | Apr 1989 | |
4945563 | Horton et al. | Jul 1990 | |
5130810 | Ryan | Jul 1992 | |
5157510 | Quan et al. | Oct 1992 | |
5177485 | Daniel et al. | Jan 1993 | |
5194965 | Quan et al. | Mar 1993 | |
5208856 | Leduc et al. | May 1993 |
Number | Date | Country |
---|---|---|
519320 | Dec 1992 | EPX |
2609589 | Jul 1988 | FRX |
2131000 | Jun 1984 | GBX |
Entry |
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Heinz Griesshaber, "Managing Secure and Confidential Video Distribution"; 1991 IEEE WPM 5.6; pp. 74-75. |