NL71657C - - Google Patents
Info
- Publication number
- NL71657C NL71657C NL71657DA NL71657C NL 71657 C NL71657 C NL 71657C NL 71657D A NL71657D A NL 71657DA NL 71657 C NL71657 C NL 71657C
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB289545X | 1940-06-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL71657C true NL71657C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=10283886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL71657D NL71657C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1940-06-11 |
Country Status (4)
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1762060A1 (de) * | 1967-03-31 | 1970-04-30 | Nippon Electric Co | Zwischenamtswaehlsystem fuer ein Fernsprech-Waehlvermittlungsnetz |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1963747A (en) * | 1934-06-19 | Telephone system | ||
| FR39002E (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1927-08-09 | 1931-08-25 | ||
| US2269462A (en) * | 1940-06-21 | 1942-01-13 | Bell Telephone Labor Inc | Telephone system |
| US2276037A (en) * | 1940-09-07 | 1942-03-10 | Bell Telephone Labor Inc | Telephone system |
-
0
- NL NL71657D patent/NL71657C/xx active
-
1940
- 1940-06-11 GB GB10163/40A patent/GB609474A/en not_active Expired
-
1943
- 1943-05-08 US US486274A patent/US2423084A/en not_active Expired - Lifetime
-
1947
- 1947-03-29 CH CH289545D patent/CH289545A/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US2423084A (en) | 1947-07-01 |
| GB609474A (en) | 1948-10-01 |
| CH289545A (fr) | 1953-03-15 |