NL294970A - - Google Patents
Info
- Publication number
- NL294970A NL294970A NL294970DA NL294970A NL 294970 A NL294970 A NL 294970A NL 294970D A NL294970D A NL 294970DA NL 294970 A NL294970 A NL 294970A
- Authority
- NL
- Netherlands
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
- H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Noise Elimination (AREA)
- Selective Calling Equipment (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR940522A FR83974E (fr) | 1963-07-05 | 1963-07-05 | Récepteur à fréquences vocales |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL294970A true NL294970A (en:Method) |
Family
ID=8807676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL294970D NL294970A (en:Method) | 1963-07-05 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3299216A (en:Method) |
| BE (1) | BE634529A (en:Method) |
| DE (1) | DE1196249B (en:Method) |
| FR (1) | FR83974E (en:Method) |
| NL (1) | NL294970A (en:Method) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1537837B1 (de) * | 1967-09-28 | 1970-11-12 | Siemens Ag | Schaltungsanordnung fuer frequenzselektive Waehlkennzeichenempfaenger in Fernmelde-,insbesondere Fernsprechanlagen |
| DE2334426A1 (de) * | 1973-07-06 | 1975-01-23 | Telefonbau & Normalzeit Gmbh | Auswerter fuer sprachgeschuetzte frequenzselektive zeichenempfaenger nach dem mehrfrequenzverfahren |
| JPS5242308A (en) * | 1975-10-01 | 1977-04-01 | Iwatsu Electric Co Ltd | Multiplex frequency signal receiver |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL267564A (en:Method) * | 1960-08-22 |
-
0
- BE BE634529D patent/BE634529A/de unknown
- NL NL294970D patent/NL294970A/xx unknown
-
1962
- 1962-07-06 DE DEST19452A patent/DE1196249B/de active Pending
-
1963
- 1963-07-01 US US291912A patent/US3299216A/en not_active Expired - Lifetime
- 1963-07-05 FR FR940522A patent/FR83974E/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1196249B (de) | 1965-07-08 |
| BE634529A (en:Method) | |
| FR83974E (fr) | 1964-11-06 |
| US3299216A (en) | 1967-01-17 |