BE538125A - - Google Patents
Info
- Publication number
- BE538125A BE538125A BE538125DA BE538125A BE 538125 A BE538125 A BE 538125A BE 538125D A BE538125D A BE 538125DA BE 538125 A BE538125 A BE 538125A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages
Landscapes
- 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 |
|---|---|---|---|
| US429748A US2874225A (en) | 1954-05-14 | 1954-05-14 | Busy-verification automatic telephone system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE538125A true BE538125A (xx) |
Family
ID=23704575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE538125D BE538125A (xx) | 1954-05-14 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2874225A (xx) |
| BE (1) | BE538125A (xx) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3410960A (en) * | 1965-03-09 | 1968-11-12 | Bell Telephone Labor Inc | No-test or busy verification in a private branch exchange telephone system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1929587A (en) * | 1931-05-22 | 1933-10-10 | Siemens Ag | Telephone system |
| FR964165A (xx) * | 1940-07-11 | 1950-08-08 | ||
| US2337365A (en) * | 1941-12-15 | 1943-12-21 | Automatic Elect Lab | Telephone system |
| US2365996A (en) * | 1942-08-12 | 1944-12-26 | Kellogg Switchboard & Supply | Private branch exchange automatic telephone system |
| GB588563A (en) * | 1944-08-25 | 1947-05-28 | Automatic Telephone & Elect | Improvements in or relating to telephone systems |
-
0
- BE BE538125D patent/BE538125A/xx unknown
-
1954
- 1954-05-14 US US429748A patent/US2874225A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2874225A (en) | 1959-02-17 |