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EP0229923
European procedure
Extract from the Register of European Patents
EP About this file: EP0229923
| EP0229923 - Multilevel QAM transmission system introducing supplementary signal points [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 17.12.1992 Database last updated on 26.06.2024 | Most recent event Tooltip | 17.12.1992 | No opposition filed within time limit | published on 03.02.1993 [1993/05] | Applicant(s) | For all designated states NEC Corporation 7-1, Shiba 5-chome Minato-ku Tokyo 108-8001 / JP | [N/P] |
| Former [1987/31] | For all designated states NEC CORPORATION 7-1, Shiba 5-chome Minato-ku Tokyo / JP | Inventor(s) | 01 /
Yasuharu, Yoshida c/o NEC Corporation 33-1, Shiba 5-chome Minato-ku Tokyo / JP | [1987/31] | Representative(s) | Vossius & Partner Patentanwälte Rechtsanwälte mbB Siebertstrasse 3 81675 München / DE | [N/P] |
| Former [1987/31] | VOSSIUS & PARTNER Postfach 86 07 67 D-81634 München / DE | Application number, filing date | 86116135.4 | 21.11.1986 | [1987/31] | Priority number, date | JP19850262846 | 21.11.1985 Original published format: JP 26284685 | JP19850262847 | 21.11.1985 Original published format: JP 26284785 | [1987/31] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0229923 | Date: | 29.07.1987 | Language: | EN | [1987/31] | Type: | A3 Search report | No.: | EP0229923 | Date: | 27.01.1988 | Language: | EN | [1988/04] | Type: | B1 Patent specification | No.: | EP0229923 | Date: | 12.02.1992 | Language: | EN | [1992/07] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 07.12.1987 | Classification | IPC: | H04L27/34 | [1992/07] | CPC: |
B60N2/0292 (EP,US);
H04L27/3461 (EP,US)
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| Former IPC [1987/31] | H04L27/02 | Designated contracting states | DE, FR, IT, NL [1987/31] | Title | German: | Mehrpegeliges QAM-Übertragungssystem mit zusätzlichen Signalpunkten | [1987/31] | English: | Multilevel QAM transmission system introducing supplementary signal points | [1987/31] | French: | Système de transmission QAM multiniveaux introduisant des points supplémentaires dans le signal | [1987/31] | Examination procedure | 21.11.1986 | Examination requested [1987/31] | 23.03.1990 | Despatch of a communication from the examining division (Time limit: M06) | 02.10.1990 | Reply to a communication from the examining division | 06.02.1991 | Despatch of communication of intention to grant (Approval: Yes) | 15.05.1991 | Communication of intention to grant the patent | 23.08.1991 | Fee for grant paid | 23.08.1991 | Fee for publishing/printing paid | Opposition(s) | 13.11.1992 | No opposition filed within time limit [1993/05] | Fees paid | Renewal fee | 29.11.1988 | Renewal fee patent year 03 | 28.11.1989 | Renewal fee patent year 04 | 29.11.1990 | Renewal fee patent year 05 | 28.11.1991 | Renewal fee patent year 06 |
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