FR2167750A1 - - Google Patents
Info
- Publication number
- FR2167750A1 FR2167750A1 FR7300372A FR7300372A FR2167750A1 FR 2167750 A1 FR2167750 A1 FR 2167750A1 FR 7300372 A FR7300372 A FR 7300372A FR 7300372 A FR7300372 A FR 7300372A FR 2167750 A1 FR2167750 A1 FR 2167750A1
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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 (2)
| Publication Number | Publication Date |
|---|---|
| FR2167750A1 true FR2167750A1 (US20020193084A1-20021219-M00002.png) | 1973-08-24 |
| FR2167750B1 FR2167750B1 (US20020193084A1-20021219-M00002.png) | 1977-12-30 |
Family
ID=9709243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7300372A Expired FR2167750B1 (US20020193084A1-20021219-M00002.png) | 1972-01-06 | 1973-01-05 |
Country Status (6)
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
Non-Patent Citations (1)
| Title |
|---|
| NEANT * |
Also Published As
| Publication number | Publication date |
|---|---|
| IT976274B (it) | 1974-08-20 |
| DE2300262B2 (de) | 1974-07-25 |
| AU5044172A (en) | 1973-08-23 |
| DE2300262A1 (de) | 1973-07-19 |
| DE2300262C3 (US20020193084A1-20021219-M00002.png) | 1975-04-03 |
| CA1018601A (en) | 1977-10-04 |
| GB1360301A (en) | 1974-07-17 |
| FR2167750B1 (US20020193084A1-20021219-M00002.png) | 1977-12-30 |
| CH567312A5 (US20020193084A1-20021219-M00002.png) | 1975-09-30 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |