Number | Name | Date | Kind |
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4713656 | Cliff et al. | Dec 1987 | |
5565910 | Rowse et al. | Oct 1996 |
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"PictureTel introduces new Windows 95--based desktop develop videoconferencing product: New standards-based PCS 200 jointly with Compaq", PictureTel Corporation News Release, 16 Oct. 1995, pp. 1-4. |