BE439749A - - Google Patents
Info
- Publication number
- BE439749A BE439749A BE439749DA BE439749A BE 439749 A BE439749 A BE 439749A BE 439749D A BE439749D A BE 439749DA BE 439749 A BE439749 A BE 439749A
- 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 |
|---|---|---|---|
| DE216069X | 1939-12-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE439749A true BE439749A (sh) |
Family
ID=5827284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE439749D BE439749A (sh) | 1939-12-08 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE439749A (sh) |
| CH (1) | CH216069A (sh) |
-
0
- BE BE439749D patent/BE439749A/xx unknown
-
1940
- 1940-11-04 CH CH216069D patent/CH216069A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH216069A (de) | 1941-07-31 |