-
EP0021018
European procedure
Extract from the Register of European Patents
EP About this file: EP0021018
| EP0021018 - Digital filters [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 07.06.1985 Database last updated on 28.03.2026 | Most recent event Tooltip | 07.06.1985 | No opposition filed within time limit | published on 07.08.1985 [1985/32] | Applicant(s) | For all designated states NEC Corporation 7-1, Shiba 5-chome Minato-ku Tokyo 108-8001 / JP | [N/P] |
| Former [1981/01] | For all designated states NEC CORPORATION 7-1, Shiba 5-chome Minato-ku Tokyo / JP | Inventor(s) | 01 /
Nakayama, Kenji c/o Nippon Electric Co., Ltd. 33-1, Shiba Gochome Minato-ku, Tokyo / JP | [1981/01] | Representative(s) | Kehl, Günther, et al Kehl, Ascherl, Liebhoff & Ettmayr Patentanwälte Friedrich-Herschel-Strasse 9 81679 München / DE | [N/P] |
| Former [1983/51] | Kehl, Günther, Dipl.-Phys., et al Patentanwälte Hagemann & Kehl Postfach 86 03 29 D-81630 München / DE | ||
| Former [1981/01] | von Samson-Himmelstjerna, Friedrich R., Dipl.-Phys. SAMSON & PARTNER, Widenmayerstrasse 5 D-80538 München / DE | Application number, filing date | 80102726.9 | 16.05.1980 | [1981/01] | Priority number, date | JP19790059895 | 16.05.1979 Original published format: JP 5989579 | [1981/01] | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP0021018 | Date: | 07.01.1981 | Language: | EN | [1981/01] | Type: | B1 Patent specification | No.: | EP0021018 | Date: | 08.08.1984 | Language: | EN | [1984/32] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 09.09.1980 | Classification | IPC: | H03H17/02 | [1981/01] | CPC: |
H03H17/0225 (EP,US)
| Designated contracting states | DE, FR, GB, NL [1981/01] | Title | German: | Digitale Filter | [1981/01] | English: | Digital filters | [1981/01] | French: | Filtres numériques | [1981/01] | Examination procedure | 30.06.1981 | Examination requested [1981/40] | 07.04.1982 | Despatch of a communication from the examining division (Time limit: M06) | 23.08.1982 | Reply to a communication from the examining division | 18.01.1983 | Despatch of a communication from the examining division (Time limit: M02) | 23.03.1983 | Reply to a communication from the examining division | 14.06.1983 | Despatch of communication of intention to grant (Approval: ) | 02.11.1983 | Communication of intention to grant the patent | 08.02.1984 | Fee for grant paid | 08.02.1984 | Fee for publishing/printing paid | Opposition(s) | 09.05.1985 | No opposition filed within time limit [1985/32] | Fees paid | Renewal fee | 26.05.1982 | Renewal fee patent year 03 | 16.05.1983 | Renewal fee patent year 04 | 15.05.1984 | Renewal fee patent year 05 |
| Opt-out from the exclusive Tooltip competence of the Unified Patent Court | See the Register of the Unified Patent Court for opt-out data | ||
| Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court. | Documents cited: | Search | IEEE TRANSACTIONS ON COMPUTERS, Vol. 25, Nr. 10, October 1976 New York (US) SHALHAV ZOHAR: "A realization of the RAM digital filter", pages 1048-1052 * figures 1-3; pages 1049-1050 the paragraphs: "II. The algorithm of a RAM digital filter" and "III. The realization of a Non-recursive RAM digital filter" * |