| Number | Date | Country | Kind |
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| 9-271288 | Oct 1997 | JP | |
| 9-277309 | Oct 1997 | JP | |
| 10-092178 | Mar 1998 | JP |
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|---|---|---|---|
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| 5229810 | Cloutier et al. | Jul 1993 | A |
| 5488558 | Ohki | Jan 1996 | A |
| 5633678 | Parulski et al. | May 1997 | A |
| 5666578 | Oikawa et al. | Sep 1997 | A |
| 5694019 | Uchida et al. | Dec 1997 | A |
| 5799217 | Saegusa et al. | Aug 1998 | A |
| 5806005 | Hull et al. | Sep 1998 | A |
| 5862218 | Steinberg | Jan 1999 | A |
| 5898386 | Kaihatsu | Apr 1999 | A |
| 5917542 | Moghadam et al. | Jun 1999 | A |
| 5974401 | Enomoto et al. | Oct 1999 | A |
| 6006039 | Steinberg et al. | Dec 1999 | A |
| 6167208 | Sato | Dec 2000 | A |
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| 6201571 | Ota | Mar 2001 | B1 |
| 6552743 | Rissman | Apr 2003 | B1 |
| 6701058 | Tsubaki | Mar 2004 | B1 |
| Number | Date | Country |
|---|---|---|
| 0860980 | Aug 1998 | EP |
| Entry |
|---|
| Understanding Data Communications, Second Edition, by George Friend et al. Published 1988 by Howrd W. Sams and Company (p. 177). |