This application is a divisional of application Ser. No. 08/994,659, filed Dec. 19, 1997, (now U.S. Pat. No. 5,884,172, issued Mar. 16, 1999), which is a continuation of application Ser. No. 08/454,913, filed May 31, 1995 (now abandoned).
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5199031 | Dahlin | Mar 1993 | |
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5257399 | Kallin et al. | Oct 1993 | |
5260988 | Schellinger et al. | Nov 1993 | |
5267261 | Blakeney et al. | Nov 1993 | |
5278890 | Beeson, Jr. et al. | Jan 1994 | |
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5309501 | Kozik et al. | May 1994 | |
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5442680 | Schellinger et al. | Aug 1995 | |
5463675 | Gerszberg | Oct 1995 | |
5475735 | Williams et al. | Dec 1995 | |
5504803 | Yamada et al. | Apr 1996 | |
5528664 | Slekys et al. | Jun 1996 | |
5537610 | Mauger et al. | Jul 1996 | |
5557654 | Maenpaa | Sep 1996 | |
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5597780 | Wiedeman et al. | Jan 1997 | |
5603081 | Raith et al. | Feb 1997 | |
5778316 | Persson et al. | Jul 1998 | |
5826191 | Krishnan | Oct 1998 | |
5884172 | Sawyer | Mar 1999 | |
5924026 | Krishnan | Jul 1999 |
Number | Date | Country |
---|---|---|
0 497 203 A3 | Aug 1992 | EPX |
0 622 928 A1 | Nov 1994 | EPX |
WO 9303585 | Feb 1993 | WOX |
WO 9410814 | May 1994 | WOX |
Entry |
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WIRELESS WEEK, "How Cellular Telephone System Work", Aug. 1999. |
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"European Digital Cellular Telecommunications System (Phase 1); Unstructured Supplementary Service Data (USSD)--Stage 1 (GSM 02.90), Version 4.0.2", European Telecommunication Standards Institute, Mar. 1994. |
"European Digital Cellular Telecommunications System (Phase 2); Unstructured Supplementary Service Data (USSD)--stage 2 (GSM 03.90), Version 4.01", European Telecommunication Standards Institute, Mar. 1994. |
"European Digital Cellular Telecommunication System (Phase 2); Unstructured Supplementary Service Data (USSD)--Stage 3 (GSM 04.90), Version: 4.0.1", European Telecommunications Standards Institute, Mar. 1994. |
"European Digital Cellular Telecommunication System (Phase 2); Stage 1 Description of Unstructured Supplementary Service Data (USSD)--(GSM 02.90), Version: 4.0.1", European Telecommunications Standards Institute, Oct. 29, 1993. |
"Technical Realization of Unstructured Supplementary Service Data, Verison 4.0.0, Cover Note to Technical Specification (GsM 03.90)", Mick Crook Hutchison Microtel (GB), September 1993. |
Number | Date | Country | |
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Parent | 994659 | Dec 1997 |
Number | Date | Country | |
---|---|---|---|
Parent | 454913 | May 1995 |