CH567312A5 - - Google Patents
Info
- Publication number
- CH567312A5 CH567312A5 CH6773A CH6773A CH567312A5 CH 567312 A5 CH567312 A5 CH 567312A5 CH 6773 A CH6773 A CH 6773A CH 6773 A CH6773 A CH 6773A CH 567312 A5 CH567312 A5 CH 567312A5
- 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)
- Monitoring And Testing Of Transmission In General (AREA)
- Manipulation Of Pulses (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB71372A GB1360301A (en) | 1972-01-06 | 1972-01-06 | Receivers for plural f'equency signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH567312A5 true CH567312A5 (enExample) | 1975-09-30 |
Family
ID=9709243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH6773A CH567312A5 (enExample) | 1972-01-06 | 1973-01-04 |
Country Status (6)
| Country | Link |
|---|---|
| CA (1) | CA1018601A (enExample) |
| CH (1) | CH567312A5 (enExample) |
| DE (1) | DE2300262B2 (enExample) |
| FR (1) | FR2167750B1 (enExample) |
| GB (1) | GB1360301A (enExample) |
| IT (1) | IT976274B (enExample) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3328027A1 (de) * | 1983-08-03 | 1985-02-21 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zum erkennen von frequenzen eines zugefuehrten signals |
-
1972
- 1972-01-06 GB GB71372A patent/GB1360301A/en not_active Expired
- 1972-12-29 IT IT7118972A patent/IT976274B/it active
-
1973
- 1973-01-03 CA CA160,452A patent/CA1018601A/en not_active Expired
- 1973-01-04 DE DE19732300262 patent/DE2300262B2/de active Granted
- 1973-01-04 CH CH6773A patent/CH567312A5/xx not_active IP Right Cessation
- 1973-01-05 FR FR7300372A patent/FR2167750B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2300262A1 (de) | 1973-07-19 |
| GB1360301A (en) | 1974-07-17 |
| FR2167750A1 (enExample) | 1973-08-24 |
| FR2167750B1 (enExample) | 1977-12-30 |
| IT976274B (it) | 1974-08-20 |
| CA1018601A (en) | 1977-10-04 |
| AU5044172A (en) | 1973-08-23 |
| DE2300262C3 (enExample) | 1975-04-03 |
| DE2300262B2 (de) | 1974-07-25 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |