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4449248 | Leslie et al. | May 1984 | |
5107443 | Smith et al. | Apr 1992 | |
5473363 | Ng et al. | Dec 1995 | |
5548591 | Horikoshi | Aug 1996 |
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"Picture Tel introduces new Windows 95--based desktop videconferencing product: New standards-based PCS 200 jointly developed with Compaq", Picture Tel Corporation News Release, 16 Oct., 1995, pp. 1--4. |