NL52553C - - Google Patents
Info
- Publication number
- NL52553C NL52553C NL52553DA NL52553C NL 52553 C NL52553 C NL 52553C NL 52553D A NL52553D A NL 52553DA NL 52553 C NL52553 C NL 52553C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
- H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
- H04Q3/625—Arrangements in the private branch exchange
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE199333X | 1936-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL52553C true NL52553C (en:Method) |
Family
ID=20304846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL52553D NL52553C (en:Method) | 1936-09-28 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2220423A (en:Method) |
| CH (1) | CH199333A (en:Method) |
| DE (1) | DE684063C (en:Method) |
| FR (1) | FR827166A (en:Method) |
| NL (1) | NL52553C (en:Method) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL259386A (en:Method) * | 1959-12-23 | |||
| BE622151A (en:Method) * | 1961-09-05 | |||
| US3215784A (en) * | 1961-12-22 | 1965-11-02 | Bell Telephone Labor Inc | Multicustomer private branch exchange |
| GB1084099A (en:Method) * | 1963-12-20 |
-
0
- NL NL52553D patent/NL52553C/xx active
-
1937
- 1937-03-24 DE DET48398D patent/DE684063C/de not_active Expired
- 1937-09-25 CH CH199333D patent/CH199333A/de unknown
- 1937-09-27 FR FR827166D patent/FR827166A/fr not_active Expired
- 1937-09-27 US US166003A patent/US2220423A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE684063C (de) | 1939-11-22 |
| FR827166A (fr) | 1938-04-20 |
| CH199333A (de) | 1938-08-15 |
| US2220423A (en) | 1940-11-05 |