BE522252A - - Google Patents
Info
- Publication number
- BE522252A BE522252A BE522252DA BE522252A BE 522252 A BE522252 A BE 522252A BE 522252D A BE522252D A BE 522252DA BE 522252 A BE522252 A BE 522252A
- Authority
- BE
- Belgium
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)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE319079X | 1952-08-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE522252A true BE522252A (fr) |
Family
ID=6151497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE522252D BE522252A (fr) | 1952-08-23 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2897277A (fr) |
| BE (1) | BE522252A (fr) |
| CH (1) | CH319079A (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3569634A (en) * | 1967-06-27 | 1971-03-09 | Claudio Amadasi | Blocking circuit for telephone apparatus |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1567240A (en) * | 1923-10-11 | 1925-12-29 | Western Electric Co | Restricted-service automatic telephone system |
| US1804776A (en) * | 1929-07-15 | 1931-05-12 | Charles T James | Safety cage window |
| US1960037A (en) * | 1932-08-19 | 1934-05-22 | Bell Telephone Labor Inc | Telephone system |
| US2005595A (en) * | 1932-10-21 | 1935-06-18 | Western Electric Co | Telephone system |
| US2294500A (en) * | 1940-10-16 | 1942-09-01 | Bell Telephone Labor Inc | Telephone system |
| US2524773A (en) * | 1944-04-04 | 1950-10-10 | Int Standard Electric Corp | Calling party identification for automatic telephone systems |
| US2519867A (en) * | 1947-05-22 | 1950-08-22 | Automatic Elect Lab | Restricted service telephone system |
| US2544944A (en) * | 1947-06-03 | 1951-03-13 | Automatic Elect Lab | Restricted service automatic telephone system |
-
0
- BE BE522252D patent/BE522252A/xx unknown
-
1953
- 1953-08-19 US US375255A patent/US2897277A/en not_active Expired - Lifetime
- 1953-08-22 CH CH319079D patent/CH319079A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH319079A (de) | 1957-01-31 |
| US2897277A (en) | 1959-07-28 |