| Number | Name | Date | Kind |
|---|---|---|---|
| 4305101 | Yarbrough | Dec 1981 | |
| 4701794 | Froling et al. | Oct 1987 | |
| 4821102 | Ischikawa et al. | Apr 1989 | |
| 4908713 | Levine | Mar 1990 |
| Number | Date | Country |
|---|---|---|
| WO880457 | Jun 1988 | WOX |
| 2185670 | Jul 1987 | GBX |
| 2207314 | Jan 1989 | GBX |
| Entry |
|---|
| Mangold, Publ. German Application 2,918,846, filed May 10, 1979, disclosed 11-13-80. |
| "VPV-Videotext Programs Videorecorder", by Bensch, IEEE Jun. 1988, pp. 788-792. |