NL81147C - - Google Patents
Info
- Publication number
- NL81147C NL81147C NL81147DA NL81147C NL 81147 C NL81147 C NL 81147C NL 81147D A NL81147D A NL 81147DA NL 81147 C NL81147 C NL 81147C
- 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
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Amplifiers (AREA)
- Telephonic Communication Services (AREA)
- Noise Elimination (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL160821 | 1951-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL81147C true NL81147C (en:Method) |
Family
ID=29244855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL81147D NL81147C (en:Method) | 1951-04-27 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US2698878A (en:Method) |
| BE (1) | BE510949A (en:Method) |
| CH (1) | CH318089A (en:Method) |
| DE (1) | DE1001708B (en:Method) |
| ES (1) | ES203030A1 (en:Method) |
| FR (1) | FR1066097A (en:Method) |
| GB (1) | GB704922A (en:Method) |
| NL (1) | NL81147C (en:Method) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1097489B (de) * | 1956-09-20 | 1961-01-19 | Siemens Ag | Schaltungsanordnung zum Empfang von durch zwei vorzugsweise tonfrequente Kennfrequenzen uebertragenen Zeichen |
| NL107582C (en:Method) * | 1958-04-03 | |||
| US3103558A (en) * | 1959-09-24 | 1963-09-10 | Int Standard Electric Corp | ligotky |
| US3087999A (en) * | 1959-12-08 | 1963-04-30 | Motorola Inc | Mobile dialing system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL93258C (en:Method) * | 1938-05-07 | |||
| FR864985A (fr) * | 1940-01-03 | 1941-05-09 | Soc Et Liaisons Telephoniques | Procédé et dispositif d'appels destinés aux communications téléphoniques |
| BE476038A (en:Method) * | 1944-12-26 |
-
0
- NL NL81147D patent/NL81147C/xx active
-
1952
- 1952-02-22 GB GB4729/52A patent/GB704922A/en not_active Expired
- 1952-04-05 US US280728A patent/US2698878A/en not_active Expired - Lifetime
- 1952-04-17 ES ES0203030A patent/ES203030A1/es not_active Expired
- 1952-04-25 BE BE510949A patent/BE510949A/nl unknown
- 1952-04-25 FR FR1066097D patent/FR1066097A/fr not_active Expired
- 1952-04-25 DE DEI5773A patent/DE1001708B/de active Pending
- 1952-04-26 CH CH318089D patent/CH318089A/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB704922A (en) | 1954-03-03 |
| DE1001708B (de) | 1957-01-31 |
| ES203030A1 (es) | 1952-06-01 |
| FR1066097A (fr) | 1954-06-02 |
| BE510949A (nl) | 1953-11-06 |
| US2698878A (en) | 1955-01-04 |
| CH318089A (fr) | 1956-12-15 |