NL109808C - - Google Patents
Info
- Publication number
- NL109808C NL109808C NL109808DA NL109808C NL 109808 C NL109808 C NL 109808C NL 109808D A NL109808D A NL 109808DA NL 109808 C NL109808 C NL 109808C
- 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
- H04Q1/45—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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB10412/54A GB810724A (en) | 1954-04-08 | 1954-04-08 | Improvements in alternating current signal receiving apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL109808C true NL109808C (xx) |
Family
ID=9967351
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL109808D NL109808C (xx) | 1954-04-08 | ||
| NL205385D NL205385A (xx) | 1954-04-08 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL205385D NL205385A (xx) | 1954-04-08 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2930852A (xx) |
| BE (1) | BE546101A (xx) |
| DE (1) | DE1042038B (xx) |
| FR (1) | FR1148651A (xx) |
| GB (1) | GB810724A (xx) |
| NL (2) | NL205385A (xx) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3231680A (en) * | 1961-07-26 | 1966-01-25 | Nippon Electric Co | Automatic telephone switching system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2317191A (en) * | 1941-01-24 | 1943-04-20 | Bell Telephone Labor Inc | Telephone system |
| NL76339C (xx) * | 1946-02-07 | |||
| US2483445A (en) * | 1946-12-13 | 1949-10-04 | Standard Telephones Cables Ltd | Transmitter system |
| US2490833A (en) * | 1947-04-26 | 1949-12-13 | Fed Telecomm Labs Inc | All electronic line finder and selector system |
| US2619548A (en) * | 1948-05-15 | 1952-11-25 | Int Standard Electric Corp | Electronic switching apparatus for telephone systems |
| DE820160C (de) * | 1950-05-20 | 1951-11-08 | Normalzeit G M B H | Schaltungsanordnung fuer Tonfrequenzwahlsystem |
| DE846419C (de) * | 1951-01-05 | 1952-08-11 | Siemens Ag | Nachrichtenuebertragungssystem |
-
0
- NL NL109808D patent/NL109808C/xx active
- NL NL205385D patent/NL205385A/xx unknown
- BE BE546101D patent/BE546101A/xx unknown
-
1954
- 1954-04-08 GB GB10412/54A patent/GB810724A/en not_active Expired
-
1955
- 1955-03-31 US US498376A patent/US2930852A/en not_active Expired - Lifetime
- 1955-04-07 DE DEH23567A patent/DE1042038B/de active Pending
-
1956
- 1956-03-14 FR FR1148651D patent/FR1148651A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1042038B (de) | 1958-10-30 |
| NL205385A (xx) | |
| GB810724A (en) | 1959-03-25 |
| FR1148651A (fr) | 1957-12-12 |
| BE546101A (xx) | |
| US2930852A (en) | 1960-03-29 |