CH592994A5 - - Google Patents
Info
- Publication number
- CH592994A5 CH592994A5 CH407275A CH407275A CH592994A5 CH 592994 A5 CH592994 A5 CH 592994A5 CH 407275 A CH407275 A CH 407275A CH 407275 A CH407275 A CH 407275A CH 592994 A5 CH592994 A5 CH 592994A5
- Authority
- CH
- Switzerland
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7414300A FR2269261B1 (xx) | 1974-04-24 | 1974-04-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH592994A5 true CH592994A5 (xx) | 1977-11-15 |
Family
ID=9138073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH407275A CH592994A5 (xx) | 1974-04-24 | 1975-04-07 |
Country Status (9)
Country | Link |
---|---|
BE (1) | BE827409A (xx) |
CH (1) | CH592994A5 (xx) |
DE (1) | DE2517807A1 (xx) |
FR (1) | FR2269261B1 (xx) |
GB (1) | GB1501706A (xx) |
IE (1) | IE41016B1 (xx) |
IT (1) | IT1037582B (xx) |
NL (1) | NL7504828A (xx) |
SE (1) | SE7504573L (xx) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2370386A1 (fr) * | 1976-11-05 | 1978-06-02 | Constr Telephoniques | Melangeur pour recepteur de signaux multifrequences |
FR2485843B1 (fr) * | 1980-06-25 | 1986-11-07 | Cit Alcatel | Recepteur numerique de frequences |
-
1974
- 1974-04-24 FR FR7414300A patent/FR2269261B1/fr not_active Expired
-
1975
- 1975-04-01 BE BE1006560A patent/BE827409A/xx unknown
- 1975-04-07 CH CH407275A patent/CH592994A5/xx not_active IP Right Cessation
- 1975-04-21 SE SE7504573A patent/SE7504573L/ not_active Application Discontinuation
- 1975-04-21 GB GB1633575A patent/GB1501706A/en not_active Expired
- 1975-04-22 DE DE19752517807 patent/DE2517807A1/de not_active Withdrawn
- 1975-04-23 NL NL7504828A patent/NL7504828A/xx active Search and Examination
- 1975-04-23 IT IT2262175A patent/IT1037582B/it active
- 1975-04-23 IE IE90875A patent/IE41016B1/xx unknown
Also Published As
Publication number | Publication date |
---|---|
FR2269261B1 (xx) | 1976-12-17 |
GB1501706A (en) | 1978-02-22 |
SE7504573L (sv) | 1975-10-27 |
IE41016B1 (en) | 1979-09-26 |
DE2517807A1 (de) | 1975-11-06 |
IT1037582B (it) | 1979-11-20 |
BE827409A (fr) | 1975-10-01 |
NL7504828A (nl) | 1975-10-28 |
FR2269261A1 (xx) | 1975-11-21 |
IE41016L (en) | 1975-10-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |