FR957473A - - Google Patents
Info
- Publication number
- FR957473A FR957473A FR957473DA FR957473A FR 957473 A FR957473 A FR 957473A FR 957473D A FR957473D A FR 957473DA FR 957473 A FR957473 A FR 957473A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB14804/42A GB560936A (en) | 1942-10-22 | 1942-10-22 | Improvements in or relating to automatic telecommunication exchange systems |
| GB2376771X | 1942-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR957473A true FR957473A (en) | 1950-02-20 |
Family
ID=26250810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR957473D Expired FR957473A (en) | 1942-10-22 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR957473A (en) |
| GB (1) | GB560936A (en) |
-
0
- FR FR957473D patent/FR957473A/fr not_active Expired
-
1942
- 1942-10-22 GB GB14804/42A patent/GB560936A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB560936A (en) | 1944-04-27 |