BE431841A - - Google Patents
Info
- Publication number
- BE431841A BE431841A BE431841DA BE431841A BE 431841 A BE431841 A BE 431841A BE 431841D A BE431841D A BE 431841DA BE 431841 A BE431841 A BE 431841A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/14—Arrangements providing for calling or supervisory signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE206314X | 1937-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE431841A true BE431841A (en:Method) | 1939-01-31 |
Family
ID=5791837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE431841D BE431841A (en:Method) | 1937-12-27 | 1938-12-24 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE431841A (en:Method) |
| CH (1) | CH206314A (en:Method) |
| FR (1) | FR848013A (en:Method) |
| GB (1) | GB523066A (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2564378A (en) * | 1946-05-06 | 1951-08-14 | Punch Engineering Pty Ltd | Carrier system signaling circuits |
| FR965370A (en:Method) * | 1947-04-29 | 1950-09-11 |
-
1938
- 1938-12-23 GB GB37461/38A patent/GB523066A/en not_active Expired
- 1938-12-24 BE BE431841D patent/BE431841A/xx unknown
- 1938-12-24 CH CH206314D patent/CH206314A/de unknown
- 1938-12-26 FR FR848013D patent/FR848013A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR848013A (fr) | 1939-10-20 |
| GB523066A (en) | 1940-07-04 |
| CH206314A (de) | 1939-07-31 |